./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:44:36,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:44:36,851 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:44:36,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:44:36,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:44:36,881 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:44:36,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:44:36,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:44:36,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:44:36,883 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:44:36,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:44:36,884 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:44:36,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:44:36,886 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:44:36,886 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:44:36,887 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:44:36,888 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:44:36,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:44:36,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:44:36,889 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:44:36,889 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:44:36,889 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:44:36,890 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:44:36,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:44:36,890 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:44:36,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:44:36,891 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:44:36,891 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:44:36,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:44:36,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:44:36,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:44:36,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:44:36,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:44:36,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:44:36,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:44:36,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:44:36,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:44:36,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:44:36,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:44:36,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:44:36,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:44:36,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:44:36,902 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2024-10-14 17:44:37,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:44:37,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:44:37,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:44:37,181 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:44:37,182 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:44:37,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-10-14 17:44:38,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:44:38,813 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:44:38,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-10-14 17:44:38,829 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58e2d97e/a9e500cf648d4148b9d3a8410af1d3a4/FLAG4c54e32d6 [2024-10-14 17:44:39,163 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58e2d97e/a9e500cf648d4148b9d3a8410af1d3a4 [2024-10-14 17:44:39,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:44:39,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:44:39,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:44:39,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:44:39,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:44:39,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43275dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39, skipping insertion in model container [2024-10-14 17:44:39,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,218 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:44:39,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:44:39,483 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:44:39,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:44:39,562 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:44:39,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39 WrapperNode [2024-10-14 17:44:39,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:44:39,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:44:39,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:44:39,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:44:39,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,604 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2024-10-14 17:44:39,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:44:39,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:44:39,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:44:39,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:44:39,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,634 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-10-14 17:44:39,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:44:39,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:44:39,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:44:39,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:44:39,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (1/1) ... [2024-10-14 17:44:39,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:44:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:39,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 17:44:39,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 17:44:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:44:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:44:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:44:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:44:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:44:39,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:44:39,852 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:44:39,854 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:44:39,981 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-10-14 17:44:39,982 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:44:40,010 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:44:40,010 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 17:44:40,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:40 BoogieIcfgContainer [2024-10-14 17:44:40,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:44:40,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:44:40,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:44:40,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:44:40,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:44:39" (1/3) ... [2024-10-14 17:44:40,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333de5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:40, skipping insertion in model container [2024-10-14 17:44:40,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:39" (2/3) ... [2024-10-14 17:44:40,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333de5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:40, skipping insertion in model container [2024-10-14 17:44:40,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:40" (3/3) ... [2024-10-14 17:44:40,019 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2024-10-14 17:44:40,031 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:44:40,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-10-14 17:44:40,066 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:44:40,073 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;@1d93574a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:44:40,073 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-14 17:44:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 21 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) [2024-10-14 17:44:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:44:40,084 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:40,085 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:44:40,086 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:40,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833435, now seen corresponding path program 1 times [2024-10-14 17:44:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:40,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980095526] [2024-10-14 17:44:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980095526] [2024-10-14 17:44:40,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980095526] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:40,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:40,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:44:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260845841] [2024-10-14 17:44:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:40,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:44:40,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:44:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:44:40,345 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 21 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:40,379 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-10-14 17:44:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:44:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:44:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:40,388 INFO L225 Difference]: With dead ends: 21 [2024-10-14 17:44:40,389 INFO L226 Difference]: Without dead ends: 20 [2024-10-14 17:44:40,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:44:40,394 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:40,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-14 17:44:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-14 17:44:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 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) [2024-10-14 17:44:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-14 17:44:40,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 6 [2024-10-14 17:44:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:40,426 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-14 17:44:40,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-14 17:44:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:44:40,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:40,427 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:44:40,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:44:40,428 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:40,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833434, now seen corresponding path program 1 times [2024-10-14 17:44:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799265319] [2024-10-14 17:44:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:40,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799265319] [2024-10-14 17:44:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799265319] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:40,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:44:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321115483] [2024-10-14 17:44:40,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:40,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:44:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:44:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:44:40,819 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:40,909 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-10-14 17:44:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:44:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:44:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:40,911 INFO L225 Difference]: With dead ends: 27 [2024-10-14 17:44:40,912 INFO L226 Difference]: Without dead ends: 27 [2024-10-14 17:44:40,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:44:40,914 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:40,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-14 17:44:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-10-14 17:44:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 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) [2024-10-14 17:44:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-14 17:44:40,920 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 6 [2024-10-14 17:44:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:40,920 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-14 17:44:40,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-14 17:44:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:44:40,921 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:40,921 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:44:40,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:44:40,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:40,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1369773852, now seen corresponding path program 1 times [2024-10-14 17:44:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:40,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43739150] [2024-10-14 17:44:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:41,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:41,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43739150] [2024-10-14 17:44:41,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43739150] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:41,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:41,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:44:41,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096565614] [2024-10-14 17:44:41,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:41,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:44:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:44:41,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:44:41,170 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:41,233 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-14 17:44:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:44:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:44:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:41,234 INFO L225 Difference]: With dead ends: 25 [2024-10-14 17:44:41,234 INFO L226 Difference]: Without dead ends: 25 [2024-10-14 17:44:41,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:44:41,235 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:41,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 57 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-14 17:44:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-10-14 17:44:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-14 17:44:41,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 6 [2024-10-14 17:44:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:41,244 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-14 17:44:41,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-14 17:44:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:44:41,245 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:41,246 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:41,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:44:41,246 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:41,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2145075704, now seen corresponding path program 1 times [2024-10-14 17:44:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031166391] [2024-10-14 17:44:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:41,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031166391] [2024-10-14 17:44:41,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031166391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:41,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611840671] [2024-10-14 17:44:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:41,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:41,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:44:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:41,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 17:44:41,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:41,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:44:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611840671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:41,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:44:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-14 17:44:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978639569] [2024-10-14 17:44:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:41,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:44:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:44:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:44:41,470 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:41,500 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-10-14 17:44:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:44:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:44:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:41,501 INFO L225 Difference]: With dead ends: 27 [2024-10-14 17:44:41,502 INFO L226 Difference]: Without dead ends: 27 [2024-10-14 17:44:41,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:44:41,503 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:41,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-14 17:44:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-14 17:44:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) 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) [2024-10-14 17:44:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-10-14 17:44:41,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2024-10-14 17:44:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:41,512 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-10-14 17:44:41,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-10-14 17:44:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:44:41,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:41,513 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:41,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 17:44:41,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:41,718 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:41,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2092633290, now seen corresponding path program 1 times [2024-10-14 17:44:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:41,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654545660] [2024-10-14 17:44:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654545660] [2024-10-14 17:44:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654545660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331815566] [2024-10-14 17:44:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:41,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:41,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:44:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:41,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 17:44:41,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:42,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 17:44:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:42,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:42,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331815566] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:42,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:42,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-14 17:44:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899252362] [2024-10-14 17:44:42,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:42,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 17:44:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 17:44:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:44:42,391 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:42,522 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-14 17:44:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:44:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:44:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:42,524 INFO L225 Difference]: With dead ends: 25 [2024-10-14 17:44:42,525 INFO L226 Difference]: Without dead ends: 25 [2024-10-14 17:44:42,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:44:42,526 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:42,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 119 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-14 17:44:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-14 17:44:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 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) [2024-10-14 17:44:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-14 17:44:42,531 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2024-10-14 17:44:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:42,531 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-14 17:44:42,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-14 17:44:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:44:42,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:42,535 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:42,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:44:42,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:42,737 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:42,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash -869701947, now seen corresponding path program 1 times [2024-10-14 17:44:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137377272] [2024-10-14 17:44:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:42,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137377272] [2024-10-14 17:44:42,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137377272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:42,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:42,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:44:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661848092] [2024-10-14 17:44:42,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:42,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:44:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:44:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:44:42,836 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:42,884 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-14 17:44:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:44:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:44:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:42,886 INFO L225 Difference]: With dead ends: 25 [2024-10-14 17:44:42,886 INFO L226 Difference]: Without dead ends: 25 [2024-10-14 17:44:42,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:44:42,888 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:42,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-14 17:44:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-14 17:44:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 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) [2024-10-14 17:44:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-14 17:44:42,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 11 [2024-10-14 17:44:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:42,893 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-14 17:44:42,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-14 17:44:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:44:42,894 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:42,894 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:42,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 17:44:42,894 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:42,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash -869701946, now seen corresponding path program 1 times [2024-10-14 17:44:42,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:42,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160052518] [2024-10-14 17:44:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:43,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160052518] [2024-10-14 17:44:43,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160052518] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:43,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612295791] [2024-10-14 17:44:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:43,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:43,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:43,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:44:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:44:43,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:43,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:43,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-14 17:44:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612295791] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:43,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-14 17:44:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812418831] [2024-10-14 17:44:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:43,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 17:44:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 17:44:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-14 17:44:43,288 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2024-10-14 17:44:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:43,382 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-10-14 17:44:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:44:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:44:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:43,383 INFO L225 Difference]: With dead ends: 28 [2024-10-14 17:44:43,383 INFO L226 Difference]: Without dead ends: 28 [2024-10-14 17:44:43,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:44:43,384 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:43,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-14 17:44:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-10-14 17:44:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) 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) [2024-10-14 17:44:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-14 17:44:43,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2024-10-14 17:44:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:43,388 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-14 17:44:43,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2024-10-14 17:44:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-14 17:44:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:44:43,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:43,389 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:43,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:43,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:43,592 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:43,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1190188923, now seen corresponding path program 1 times [2024-10-14 17:44:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:43,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424320259] [2024-10-14 17:44:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:44:43,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:43,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424320259] [2024-10-14 17:44:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424320259] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:43,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:43,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:44:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183999855] [2024-10-14 17:44:43,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:43,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:44:43,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:44:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:44:43,643 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:43,666 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-10-14 17:44:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:44:43,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-14 17:44:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:43,667 INFO L225 Difference]: With dead ends: 31 [2024-10-14 17:44:43,668 INFO L226 Difference]: Without dead ends: 31 [2024-10-14 17:44:43,668 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 [2024-10-14 17:44:43,668 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:43,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-14 17:44:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2024-10-14 17:44:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-10-14 17:44:43,671 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 12 [2024-10-14 17:44:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:43,672 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-10-14 17:44:43,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-10-14 17:44:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:44:43,672 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:43,673 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:43,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 17:44:43,673 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:43,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1583215933, now seen corresponding path program 1 times [2024-10-14 17:44:43,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:43,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395932346] [2024-10-14 17:44:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:43,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:44:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395932346] [2024-10-14 17:44:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395932346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:43,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:43,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:44:43,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764344482] [2024-10-14 17:44:43,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:43,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:44:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:44:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:44:43,757 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:43,783 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-10-14 17:44:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:44:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-14 17:44:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:43,784 INFO L225 Difference]: With dead ends: 29 [2024-10-14 17:44:43,784 INFO L226 Difference]: Without dead ends: 29 [2024-10-14 17:44:43,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:44:43,784 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:43,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:43,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-14 17:44:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-10-14 17:44:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-14 17:44:43,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2024-10-14 17:44:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:43,790 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-14 17:44:43,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-14 17:44:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:44:43,791 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:43,791 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:43,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 17:44:43,791 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:43,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2047957108, now seen corresponding path program 1 times [2024-10-14 17:44:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828814256] [2024-10-14 17:44:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:44:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828814256] [2024-10-14 17:44:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828814256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:43,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:43,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:44:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105438432] [2024-10-14 17:44:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:43,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:44:43,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:44:43,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:44:43,869 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:43,887 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-10-14 17:44:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:44:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-14 17:44:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:43,888 INFO L225 Difference]: With dead ends: 24 [2024-10-14 17:44:43,888 INFO L226 Difference]: Without dead ends: 20 [2024-10-14 17:44:43,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:44:43,889 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:43,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-14 17:44:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-14 17:44:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-10-14 17:44:43,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2024-10-14 17:44:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:43,892 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-10-14 17:44:43,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-10-14 17:44:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:44:43,893 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:43,893 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:43,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 17:44:43,893 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:43,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash 938662836, now seen corresponding path program 1 times [2024-10-14 17:44:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:43,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305062167] [2024-10-14 17:44:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:43,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:44:43,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:43,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305062167] [2024-10-14 17:44:43,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305062167] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:44:43,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:44:43,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:44:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960367412] [2024-10-14 17:44:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:44:43,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:44:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:44:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:44:43,986 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:44,013 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-10-14 17:44:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:44:44,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:44:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:44,014 INFO L225 Difference]: With dead ends: 26 [2024-10-14 17:44:44,014 INFO L226 Difference]: Without dead ends: 16 [2024-10-14 17:44:44,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:44:44,018 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:44,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:44:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-14 17:44:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-14 17:44:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-14 17:44:44,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-10-14 17:44:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:44,020 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-14 17:44:44,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-14 17:44:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:44:44,021 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:44,021 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:44,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 17:44:44,021 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:44,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 351856822, now seen corresponding path program 1 times [2024-10-14 17:44:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:44,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602180058] [2024-10-14 17:44:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602180058] [2024-10-14 17:44:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602180058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010925781] [2024-10-14 17:44:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:44,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:44,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:44,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:44,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:44:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:44,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 17:44:44,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:44,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010925781] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:44,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:44,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-14 17:44:44,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171299163] [2024-10-14 17:44:44,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:44,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 17:44:44,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 17:44:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-10-14 17:44:44,366 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2024-10-14 17:44:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:44,445 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-10-14 17:44:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 17:44:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 [2024-10-14 17:44:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:44,446 INFO L225 Difference]: With dead ends: 25 [2024-10-14 17:44:44,446 INFO L226 Difference]: Without dead ends: 19 [2024-10-14 17:44:44,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:44:44,447 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:44,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-14 17:44:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-10-14 17:44:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-10-14 17:44:44,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2024-10-14 17:44:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:44,449 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-10-14 17:44:44,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2024-10-14 17:44:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-10-14 17:44:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 17:44:44,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:44,450 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:44,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 17:44:44,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:44,655 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:44,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1161845412, now seen corresponding path program 2 times [2024-10-14 17:44:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347143125] [2024-10-14 17:44:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:44,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347143125] [2024-10-14 17:44:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347143125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124272353] [2024-10-14 17:44:44,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:44:44,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:44,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:44,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:44,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:44:45,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:44:45,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:45,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 17:44:45,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:45,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:45,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:44:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124272353] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:45,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:45,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-10-14 17:44:45,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626240325] [2024-10-14 17:44:45,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:45,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:44:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:44:45,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:44:45,374 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:45,507 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2024-10-14 17:44:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:44:45,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-14 17:44:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:45,508 INFO L225 Difference]: With dead ends: 23 [2024-10-14 17:44:45,508 INFO L226 Difference]: Without dead ends: 23 [2024-10-14 17:44:45,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:44:45,509 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:45,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-14 17:44:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-10-14 17:44:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-10-14 17:44:45,515 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2024-10-14 17:44:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:45,515 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-10-14 17:44:45,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-10-14 17:44:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:44:45,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:45,517 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:45,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 17:44:45,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 17:44:45,722 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:45,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1567575918, now seen corresponding path program 3 times [2024-10-14 17:44:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:45,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087086117] [2024-10-14 17:44:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:45,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087086117] [2024-10-14 17:44:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087086117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16560899] [2024-10-14 17:44:45,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:44:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:45,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:45,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:44:45,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:44:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:45,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 17:44:45,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:46,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:46,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16560899] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:46,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:46,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-10-14 17:44:46,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869922116] [2024-10-14 17:44:46,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:46,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 17:44:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:46,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 17:44:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-14 17:44:46,211 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:46,315 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-10-14 17:44:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:44:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:44:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:46,316 INFO L225 Difference]: With dead ends: 35 [2024-10-14 17:44:46,316 INFO L226 Difference]: Without dead ends: 25 [2024-10-14 17:44:46,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:44:46,317 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:46,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-14 17:44:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-14 17:44:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2024-10-14 17:44:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-10-14 17:44:46,319 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2024-10-14 17:44:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:46,319 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-10-14 17:44:46,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-10-14 17:44:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 17:44:46,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:46,325 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:46,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 17:44:46,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:46,526 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:46,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:46,526 INFO L85 PathProgramCache]: Analyzing trace with hash 264927232, now seen corresponding path program 4 times [2024-10-14 17:44:46,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:46,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476412149] [2024-10-14 17:44:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:46,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476412149] [2024-10-14 17:44:46,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476412149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32837378] [2024-10-14 17:44:46,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:44:46,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:46,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:46,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:46,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:44:46,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:44:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:46,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-14 17:44:46,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:46,971 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 [2024-10-14 17:44:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:47,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32837378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:47,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:47,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-10-14 17:44:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520930957] [2024-10-14 17:44:47,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:47,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-14 17:44:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-14 17:44:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-10-14 17:44:47,505 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:47,764 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-10-14 17:44:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:44:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-14 17:44:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:47,765 INFO L225 Difference]: With dead ends: 29 [2024-10-14 17:44:47,765 INFO L226 Difference]: Without dead ends: 29 [2024-10-14 17:44:47,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-14 17:44:47,766 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:47,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 78 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-14 17:44:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-10-14 17:44:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2024-10-14 17:44:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-14 17:44:47,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2024-10-14 17:44:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:47,769 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-14 17:44:47,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-14 17:44:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 17:44:47,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:47,770 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:47,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 17:44:47,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:47,971 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:47,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1244348434, now seen corresponding path program 5 times [2024-10-14 17:44:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704093319] [2024-10-14 17:44:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704093319] [2024-10-14 17:44:48,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704093319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817980117] [2024-10-14 17:44:48,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:44:48,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:48,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:48,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:48,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:44:48,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 17:44:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:48,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 17:44:48,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:48,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817980117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:48,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-14 17:44:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553792835] [2024-10-14 17:44:48,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:48,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 17:44:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 17:44:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:44:48,565 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:48,713 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-10-14 17:44:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 17:44:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-14 17:44:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:48,714 INFO L225 Difference]: With dead ends: 45 [2024-10-14 17:44:48,714 INFO L226 Difference]: Without dead ends: 31 [2024-10-14 17:44:48,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:44:48,715 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:48,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 175 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-14 17:44:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-14 17:44:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-10-14 17:44:48,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2024-10-14 17:44:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:48,718 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-10-14 17:44:48,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-10-14 17:44:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 17:44:48,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:48,719 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:48,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 17:44:48,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 17:44:48,920 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:48,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1196080348, now seen corresponding path program 6 times [2024-10-14 17:44:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465573667] [2024-10-14 17:44:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465573667] [2024-10-14 17:44:49,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465573667] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994818719] [2024-10-14 17:44:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:44:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:49,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:49,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:44:49,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-14 17:44:49,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:49,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 17:44:49,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:49,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:49,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-14 17:44:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994818719] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:50,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-14 17:44:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928450784] [2024-10-14 17:44:50,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:50,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:44:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:44:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:44:50,054 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:50,282 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-10-14 17:44:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 17:44:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-14 17:44:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:50,283 INFO L225 Difference]: With dead ends: 35 [2024-10-14 17:44:50,284 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 17:44:50,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:44:50,285 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:50,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 17:44:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-10-14 17:44:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2024-10-14 17:44:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-10-14 17:44:50,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2024-10-14 17:44:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:50,288 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-10-14 17:44:50,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-10-14 17:44:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 17:44:50,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:50,289 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:50,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 17:44:50,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 17:44:50,490 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:50,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -139512118, now seen corresponding path program 7 times [2024-10-14 17:44:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:50,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955048253] [2024-10-14 17:44:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955048253] [2024-10-14 17:44:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955048253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044273358] [2024-10-14 17:44:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:44:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:50,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:50,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:44:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:50,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 17:44:50,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:50,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044273358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:51,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-10-14 17:44:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167285620] [2024-10-14 17:44:51,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:51,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:44:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:44:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:44:51,150 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:51,319 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2024-10-14 17:44:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 17:44:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 33 [2024-10-14 17:44:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:51,320 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:44:51,320 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 17:44:51,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2024-10-14 17:44:51,321 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:51,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 231 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:44:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 17:44:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-10-14 17:44:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-10-14 17:44:51,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2024-10-14 17:44:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:51,324 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-10-14 17:44:51,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-10-14 17:44:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 17:44:51,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:51,325 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:51,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 17:44:51,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 17:44:51,530 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:51,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1379710664, now seen corresponding path program 8 times [2024-10-14 17:44:51,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:51,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977607901] [2024-10-14 17:44:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:52,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977607901] [2024-10-14 17:44:52,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977607901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:52,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995244937] [2024-10-14 17:44:52,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:44:52,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:52,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:52,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:52,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:44:52,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:44:52,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:52,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-14 17:44:52,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:52,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:52,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:44:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:52,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995244937] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:52,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:52,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2024-10-14 17:44:52,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107250946] [2024-10-14 17:44:52,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:52,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 17:44:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 17:44:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 17:44:52,647 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:52,981 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-10-14 17:44:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 17:44:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-14 17:44:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:52,982 INFO L225 Difference]: With dead ends: 41 [2024-10-14 17:44:52,982 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 17:44:52,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2024-10-14 17:44:52,983 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:52,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 121 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 17:44:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-10-14 17:44:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2024-10-14 17:44:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-10-14 17:44:52,985 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2024-10-14 17:44:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:52,989 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-10-14 17:44:52,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-10-14 17:44:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 17:44:52,994 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:52,994 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:53,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 17:44:53,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:53,195 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:53,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash 470955302, now seen corresponding path program 9 times [2024-10-14 17:44:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:53,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91304229] [2024-10-14 17:44:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:53,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:53,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91304229] [2024-10-14 17:44:53,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91304229] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:53,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30591168] [2024-10-14 17:44:53,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:44:53,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:53,537 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:53,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 17:44:53,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-14 17:44:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:53,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 17:44:53,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:53,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:54,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30591168] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:54,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:54,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-14 17:44:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992597098] [2024-10-14 17:44:54,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:54,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:44:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:44:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:44:54,055 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:54,311 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-10-14 17:44:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 17:44:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-14 17:44:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:54,312 INFO L225 Difference]: With dead ends: 65 [2024-10-14 17:44:54,312 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 17:44:54,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:44:54,313 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:54,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 398 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 17:44:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-14 17:44:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-10-14 17:44:54,316 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2024-10-14 17:44:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:54,316 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-10-14 17:44:54,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-10-14 17:44:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 17:44:54,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:54,318 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:54,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:54,518 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:54,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash -566346476, now seen corresponding path program 10 times [2024-10-14 17:44:54,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:54,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625103236] [2024-10-14 17:44:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:55,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625103236] [2024-10-14 17:44:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625103236] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361400987] [2024-10-14 17:44:55,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:44:55,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:55,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:55,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 17:44:55,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:44:55,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:55,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-14 17:44:55,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:55,205 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 [2024-10-14 17:44:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:55,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361400987] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:55,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:55,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-10-14 17:44:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181173358] [2024-10-14 17:44:55,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:55,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-14 17:44:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-14 17:44:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 17:44:55,963 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:56,303 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2024-10-14 17:44:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 17:44:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-14 17:44:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:56,304 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:44:56,304 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 17:44:56,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 17:44:56,305 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:56,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 17:44:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-14 17:44:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2024-10-14 17:44:56,308 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2024-10-14 17:44:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:56,308 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2024-10-14 17:44:56,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2024-10-14 17:44:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 17:44:56,309 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:56,309 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:56,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 17:44:56,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-14 17:44:56,510 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:56,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -336078078, now seen corresponding path program 11 times [2024-10-14 17:44:56,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:56,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457278315] [2024-10-14 17:44:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:56,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457278315] [2024-10-14 17:44:56,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457278315] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821668261] [2024-10-14 17:44:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:44:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:56,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:56,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 17:44:56,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-14 17:44:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:56,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 17:44:56,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:57,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821668261] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:57,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:57,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-10-14 17:44:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052105288] [2024-10-14 17:44:57,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:57,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:44:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:44:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:44:57,493 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:57,761 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2024-10-14 17:44:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 17:44:57,761 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-14 17:44:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:57,762 INFO L225 Difference]: With dead ends: 75 [2024-10-14 17:44:57,762 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:44:57,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 17:44:57,763 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:57,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:44:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:44:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-14 17:44:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-10-14 17:44:57,766 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2024-10-14 17:44:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:57,766 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-10-14 17:44:57,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-10-14 17:44:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-14 17:44:57,767 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:57,767 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:44:57,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:57,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:57,972 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:44:57,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash -691160976, now seen corresponding path program 12 times [2024-10-14 17:44:57,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:57,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832519756] [2024-10-14 17:44:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832519756] [2024-10-14 17:44:58,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832519756] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014108905] [2024-10-14 17:44:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:44:58,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:58,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:58,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:44:58,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 17:44:58,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-14 17:44:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:58,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-14 17:44:58,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:58,848 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 [2024-10-14 17:44:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:59,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:59,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014108905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:59,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:59,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2024-10-14 17:44:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039126716] [2024-10-14 17:44:59,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:59,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-14 17:44:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-14 17:44:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2690, Unknown=0, NotChecked=0, Total=3080 [2024-10-14 17:44:59,837 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 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) [2024-10-14 17:45:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:00,253 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-10-14 17:45:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 17:45:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 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 47 [2024-10-14 17:45:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:00,253 INFO L225 Difference]: With dead ends: 53 [2024-10-14 17:45:00,254 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 17:45:00,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=499, Invalid=3407, Unknown=0, NotChecked=0, Total=3906 [2024-10-14 17:45:00,255 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:00,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:45:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 17:45:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-10-14 17:45:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-10-14 17:45:00,258 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2024-10-14 17:45:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:00,258 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-10-14 17:45:00,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 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) [2024-10-14 17:45:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-10-14 17:45:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-14 17:45:00,259 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:00,259 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:00,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:00,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:00,460 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:00,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -815642530, now seen corresponding path program 13 times [2024-10-14 17:45:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698343939] [2024-10-14 17:45:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:00,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698343939] [2024-10-14 17:45:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698343939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974418681] [2024-10-14 17:45:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:45:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:00,843 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:00,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 17:45:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:00,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 17:45:00,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:01,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974418681] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:01,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:01,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-10-14 17:45:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559967977] [2024-10-14 17:45:01,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:01,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-14 17:45:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-14 17:45:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 17:45:01,464 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:01,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:01,893 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-10-14 17:45:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 17:45:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-14 17:45:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:01,894 INFO L225 Difference]: With dead ends: 85 [2024-10-14 17:45:01,894 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 17:45:01,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=1930, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 17:45:01,895 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:01,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 685 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:45:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 17:45:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-14 17:45:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-10-14 17:45:01,897 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2024-10-14 17:45:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:01,897 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-10-14 17:45:01,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-10-14 17:45:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-14 17:45:01,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:01,898 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 17:45:02,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-14 17:45:02,098 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:02,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 42720076, now seen corresponding path program 14 times [2024-10-14 17:45:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:02,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576934293] [2024-10-14 17:45:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576934293] [2024-10-14 17:45:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576934293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417861415] [2024-10-14 17:45:02,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:45:02,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:02,878 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:02,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 17:45:02,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:45:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:02,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-14 17:45:02,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:03,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:03,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:45:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417861415] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:03,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2024-10-14 17:45:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098666428] [2024-10-14 17:45:03,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:03,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-14 17:45:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-14 17:45:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 17:45:03,772 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:04,247 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-10-14 17:45:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 17:45:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-10-14 17:45:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:04,248 INFO L225 Difference]: With dead ends: 59 [2024-10-14 17:45:04,248 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 17:45:04,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=2551, Unknown=0, NotChecked=0, Total=2862 [2024-10-14 17:45:04,249 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:04,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:45:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 17:45:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-14 17:45:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2024-10-14 17:45:04,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2024-10-14 17:45:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:04,252 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2024-10-14 17:45:04,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2024-10-14 17:45:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-14 17:45:04,253 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:04,253 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:04,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:04,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:04,456 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:04,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash -681861830, now seen corresponding path program 15 times [2024-10-14 17:45:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185335541] [2024-10-14 17:45:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185335541] [2024-10-14 17:45:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185335541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353494099] [2024-10-14 17:45:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:45:04,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:04,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:04,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 17:45:05,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-14 17:45:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:05,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-10-14 17:45:05,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:05,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 17:45:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:06,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 64 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:08,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353494099] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:08,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:08,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 31] total 82 [2024-10-14 17:45:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921849629] [2024-10-14 17:45:08,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:08,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-10-14 17:45:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-10-14 17:45:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=6194, Unknown=0, NotChecked=0, Total=6642 [2024-10-14 17:45:08,695 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:11,607 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2024-10-14 17:45:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-14 17:45:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-14 17:45:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:11,608 INFO L225 Difference]: With dead ends: 99 [2024-10-14 17:45:11,608 INFO L226 Difference]: Without dead ends: 65 [2024-10-14 17:45:11,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1249, Invalid=16307, Unknown=0, NotChecked=0, Total=17556 [2024-10-14 17:45:11,612 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:11,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 327 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 17:45:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-14 17:45:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-10-14 17:45:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2024-10-14 17:45:11,617 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2024-10-14 17:45:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:11,617 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2024-10-14 17:45:11,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2024-10-14 17:45:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-14 17:45:11,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:11,618 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:11,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-14 17:45:11,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:11,818 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:11,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1207302550, now seen corresponding path program 16 times [2024-10-14 17:45:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022512851] [2024-10-14 17:45:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:12,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022512851] [2024-10-14 17:45:12,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022512851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73562368] [2024-10-14 17:45:12,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:45:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:12,313 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:12,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 17:45:12,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:45:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:12,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 17:45:12,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:12,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73562368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:13,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2024-10-14 17:45:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704363085] [2024-10-14 17:45:13,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:13,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-14 17:45:13,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-14 17:45:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2024-10-14 17:45:13,285 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:13,934 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2024-10-14 17:45:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 17:45:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-14 17:45:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:13,935 INFO L225 Difference]: With dead ends: 105 [2024-10-14 17:45:13,935 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 17:45:13,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=3018, Unknown=0, NotChecked=0, Total=3192 [2024-10-14 17:45:13,936 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:13,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 981 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:45:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 17:45:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-14 17:45:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-10-14 17:45:13,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2024-10-14 17:45:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:13,938 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-10-14 17:45:13,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-10-14 17:45:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-14 17:45:13,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:13,939 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:13,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-14 17:45:14,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:14,140 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:14,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2099550084, now seen corresponding path program 17 times [2024-10-14 17:45:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137049000] [2024-10-14 17:45:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 72 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:15,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:15,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137049000] [2024-10-14 17:45:15,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137049000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:15,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074005613] [2024-10-14 17:45:15,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:45:15,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:15,142 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:15,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 17:45:15,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-14 17:45:15,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:15,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-14 17:45:15,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:15,282 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 [2024-10-14 17:45:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 90 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:15,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:16,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074005613] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:16,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:16,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 61 [2024-10-14 17:45:16,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556104982] [2024-10-14 17:45:16,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:16,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-14 17:45:16,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-14 17:45:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2024-10-14 17:45:16,583 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:17,248 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2024-10-14 17:45:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 17:45:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 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 65 [2024-10-14 17:45:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:17,249 INFO L225 Difference]: With dead ends: 71 [2024-10-14 17:45:17,249 INFO L226 Difference]: Without dead ends: 71 [2024-10-14 17:45:17,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=641, Invalid=4471, Unknown=0, NotChecked=0, Total=5112 [2024-10-14 17:45:17,250 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:17,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 271 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:45:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-14 17:45:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-10-14 17:45:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-10-14 17:45:17,253 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2024-10-14 17:45:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:17,254 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-10-14 17:45:17,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-10-14 17:45:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 17:45:17,255 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:17,255 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:17,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:17,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-14 17:45:17,456 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:17,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:17,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1572110990, now seen corresponding path program 18 times [2024-10-14 17:45:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:17,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660931995] [2024-10-14 17:45:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:18,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660931995] [2024-10-14 17:45:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660931995] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173659863] [2024-10-14 17:45:18,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:45:18,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:18,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:18,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:18,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 17:45:18,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-10-14 17:45:18,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:18,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-14 17:45:18,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:18,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173659863] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:19,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2024-10-14 17:45:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180096618] [2024-10-14 17:45:19,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:19,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-14 17:45:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-14 17:45:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2024-10-14 17:45:19,184 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:19,847 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2024-10-14 17:45:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-14 17:45:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-14 17:45:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:19,848 INFO L225 Difference]: With dead ends: 115 [2024-10-14 17:45:19,849 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 17:45:19,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=185, Invalid=3475, Unknown=0, NotChecked=0, Total=3660 [2024-10-14 17:45:19,850 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:19,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1140 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:45:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 17:45:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-10-14 17:45:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-10-14 17:45:19,852 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2024-10-14 17:45:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:19,852 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-10-14 17:45:19,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-10-14 17:45:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-14 17:45:19,853 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:19,853 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:19,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:20,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-14 17:45:20,054 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:20,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:20,054 INFO L85 PathProgramCache]: Analyzing trace with hash 492531936, now seen corresponding path program 19 times [2024-10-14 17:45:20,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:20,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000003389] [2024-10-14 17:45:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 90 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:21,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000003389] [2024-10-14 17:45:21,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000003389] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:21,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091044754] [2024-10-14 17:45:21,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:45:21,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:21,099 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:21,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 17:45:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:21,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-10-14 17:45:21,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 110 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:21,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:22,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:45:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 110 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091044754] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:22,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 57 [2024-10-14 17:45:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043389153] [2024-10-14 17:45:22,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:22,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-14 17:45:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-14 17:45:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2936, Unknown=0, NotChecked=0, Total=3306 [2024-10-14 17:45:22,331 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:23,080 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2024-10-14 17:45:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-14 17:45:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-10-14 17:45:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:23,081 INFO L225 Difference]: With dead ends: 77 [2024-10-14 17:45:23,081 INFO L226 Difference]: Without dead ends: 77 [2024-10-14 17:45:23,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=494, Invalid=4198, Unknown=0, NotChecked=0, Total=4692 [2024-10-14 17:45:23,082 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:23,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 316 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:45:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-14 17:45:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-10-14 17:45:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2024-10-14 17:45:23,084 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2024-10-14 17:45:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:23,084 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2024-10-14 17:45:23,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2024-10-14 17:45:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 17:45:23,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:23,085 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:23,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:23,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:23,285 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:23,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:23,286 INFO L85 PathProgramCache]: Analyzing trace with hash 780028110, now seen corresponding path program 20 times [2024-10-14 17:45:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:23,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611901134] [2024-10-14 17:45:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611901134] [2024-10-14 17:45:23,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611901134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704094711] [2024-10-14 17:45:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:45:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:23,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 17:45:24,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:45:24,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:24,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-14 17:45:24,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:24,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704094711] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:25,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:25,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 57 [2024-10-14 17:45:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642176646] [2024-10-14 17:45:25,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:25,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-14 17:45:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-14 17:45:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3038, Unknown=0, NotChecked=0, Total=3192 [2024-10-14 17:45:25,031 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:25,809 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2024-10-14 17:45:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-14 17:45:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-10-14 17:45:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:25,810 INFO L225 Difference]: With dead ends: 125 [2024-10-14 17:45:25,810 INFO L226 Difference]: Without dead ends: 79 [2024-10-14 17:45:25,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=4218, Unknown=0, NotChecked=0, Total=4422 [2024-10-14 17:45:25,811 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:25,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1329 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:45:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-14 17:45:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-10-14 17:45:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-10-14 17:45:25,813 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2024-10-14 17:45:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:25,813 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-10-14 17:45:25,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-10-14 17:45:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-14 17:45:25,814 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:25,814 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:25,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:26,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:26,015 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:26,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash 662270396, now seen corresponding path program 21 times [2024-10-14 17:45:26,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295110135] [2024-10-14 17:45:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:26,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 110 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295110135] [2024-10-14 17:45:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295110135] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366764997] [2024-10-14 17:45:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:45:27,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:27,087 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:27,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-14 17:45:27,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-10-14 17:45:27,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:27,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-10-14 17:45:27,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:27,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 17:45:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 322 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-14 17:45:29,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-14 17:45:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366764997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:31,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 37, 33] total 97 [2024-10-14 17:45:31,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955298421] [2024-10-14 17:45:31,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:31,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-10-14 17:45:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-10-14 17:45:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=8710, Unknown=0, NotChecked=0, Total=9506 [2024-10-14 17:45:31,977 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:41,609 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2024-10-14 17:45:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-10-14 17:45:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-10-14 17:45:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:41,610 INFO L225 Difference]: With dead ends: 127 [2024-10-14 17:45:41,610 INFO L226 Difference]: Without dead ends: 127 [2024-10-14 17:45:41,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9525 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4039, Invalid=35761, Unknown=0, NotChecked=0, Total=39800 [2024-10-14 17:45:41,614 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:41,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 566 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2909 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-14 17:45:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-14 17:45:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-10-14 17:45:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2024-10-14 17:45:41,618 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 77 [2024-10-14 17:45:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:41,620 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2024-10-14 17:45:41,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2024-10-14 17:45:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-14 17:45:41,621 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:41,621 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:41,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:41,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:41,822 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:41,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:41,822 INFO L85 PathProgramCache]: Analyzing trace with hash -876553500, now seen corresponding path program 22 times [2024-10-14 17:45:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:41,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045340312] [2024-10-14 17:45:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-14 17:45:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045340312] [2024-10-14 17:45:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045340312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157670935] [2024-10-14 17:45:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:45:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:42,860 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:42,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-14 17:45:43,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:45:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:43,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-14 17:45:43,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-14 17:45:43,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-14 17:45:44,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157670935] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:44,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:44,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2024-10-14 17:45:44,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301199810] [2024-10-14 17:45:44,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:44,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-14 17:45:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-14 17:45:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2024-10-14 17:45:44,156 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:45,125 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2024-10-14 17:45:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-14 17:45:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 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 125 [2024-10-14 17:45:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:45,126 INFO L225 Difference]: With dead ends: 179 [2024-10-14 17:45:45,126 INFO L226 Difference]: Without dead ends: 129 [2024-10-14 17:45:45,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=4755, Unknown=0, NotChecked=0, Total=4970 [2024-10-14 17:45:45,127 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:45,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1765 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:45:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-14 17:45:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2024-10-14 17:45:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2024-10-14 17:45:45,129 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2024-10-14 17:45:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:45,130 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2024-10-14 17:45:45,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2024-10-14 17:45:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-10-14 17:45:45,131 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:45,131 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:45,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-14 17:45:45,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-14 17:45:45,331 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:45,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2012720210, now seen corresponding path program 23 times [2024-10-14 17:45:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:45,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060829637] [2024-10-14 17:45:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:45,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-14 17:45:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060829637] [2024-10-14 17:45:46,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060829637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255465775] [2024-10-14 17:45:46,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:45:46,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:46,289 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:46,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-14 17:45:46,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-14 17:45:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:46,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-14 17:45:46,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-14 17:45:47,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-14 17:45:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255465775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:48,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-10-14 17:45:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359816216] [2024-10-14 17:45:48,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:48,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-14 17:45:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-14 17:45:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2024-10-14 17:45:48,149 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:49,177 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2024-10-14 17:45:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-14 17:45:49,178 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-10-14 17:45:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:49,178 INFO L225 Difference]: With dead ends: 185 [2024-10-14 17:45:49,178 INFO L226 Difference]: Without dead ends: 131 [2024-10-14 17:45:49,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=230, Invalid=5470, Unknown=0, NotChecked=0, Total=5700 [2024-10-14 17:45:49,179 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:49,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1749 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 17:45:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-14 17:45:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2024-10-14 17:45:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-10-14 17:45:49,181 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2024-10-14 17:45:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:49,182 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-10-14 17:45:49,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-10-14 17:45:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-14 17:45:49,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:49,183 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:49,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:49,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-14 17:45:49,383 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:49,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -239084992, now seen corresponding path program 24 times [2024-10-14 17:45:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937878550] [2024-10-14 17:45:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-14 17:45:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937878550] [2024-10-14 17:45:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937878550] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304245018] [2024-10-14 17:45:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:45:50,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:50,460 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:50,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-14 17:45:51,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2024-10-14 17:45:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:51,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-14 17:45:51,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-14 17:45:51,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-14 17:45:52,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304245018] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:52,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:52,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2024-10-14 17:45:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936910699] [2024-10-14 17:45:52,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:52,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-10-14 17:45:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-10-14 17:45:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2024-10-14 17:45:52,904 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:54,061 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2024-10-14 17:45:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-14 17:45:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-10-14 17:45:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:54,062 INFO L225 Difference]: With dead ends: 191 [2024-10-14 17:45:54,062 INFO L226 Difference]: Without dead ends: 133 [2024-10-14 17:45:54,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=245, Invalid=6235, Unknown=0, NotChecked=0, Total=6480 [2024-10-14 17:45:54,063 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:54,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1962 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 17:45:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-14 17:45:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-10-14 17:45:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2024-10-14 17:45:54,066 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2024-10-14 17:45:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:54,067 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2024-10-14 17:45:54,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2024-10-14 17:45:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-10-14 17:45:54,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:54,068 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:54,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:54,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-14 17:45:54,268 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:54,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash 439633070, now seen corresponding path program 25 times [2024-10-14 17:45:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:54,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648176151] [2024-10-14 17:45:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-14 17:45:55,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:55,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648176151] [2024-10-14 17:45:55,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648176151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:55,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529147388] [2024-10-14 17:45:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:45:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:55,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:55,348 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:55,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-14 17:45:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:55,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-14 17:45:55,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-14 17:45:55,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-14 17:45:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529147388] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:57,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 73 [2024-10-14 17:45:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978938659] [2024-10-14 17:45:57,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:57,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-14 17:45:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-14 17:45:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5062, Unknown=0, NotChecked=0, Total=5256 [2024-10-14 17:45:57,073 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:58,464 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2024-10-14 17:45:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-14 17:45:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 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 131 [2024-10-14 17:45:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:58,465 INFO L225 Difference]: With dead ends: 197 [2024-10-14 17:45:58,465 INFO L226 Difference]: Without dead ends: 135 [2024-10-14 17:45:58,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=264, Invalid=7218, Unknown=0, NotChecked=0, Total=7482 [2024-10-14 17:45:58,466 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:58,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2515 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 17:45:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-14 17:45:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2024-10-14 17:45:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-10-14 17:45:58,468 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2024-10-14 17:45:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:58,468 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-10-14 17:45:58,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-10-14 17:45:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-10-14 17:45:58,469 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:58,469 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:58,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-14 17:45:58,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:58,670 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-14 17:45:58,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash -147338340, now seen corresponding path program 26 times [2024-10-14 17:45:58,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:58,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480550648] [2024-10-14 17:45:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat