./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 18:43:48,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 18:43:48,159 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 18:43:48,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 18:43:48,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 18:43:48,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 18:43:48,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 18:43:48,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 18:43:48,184 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 18:43:48,184 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 18:43:48,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 18:43:48,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 18:43:48,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 18:43:48,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 18:43:48,186 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 18:43:48,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 18:43:48,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 18:43:48,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 18:43:48,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 18:43:48,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 18:43:48,187 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 18:43:48,191 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 18:43:48,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 18:43:48,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 18:43:48,192 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 18:43:48,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 18:43:48,192 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 18:43:48,193 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 18:43:48,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 18:43:48,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 18:43:48,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 18:43:48,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 18:43:48,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 18:43:48,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:43:48,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 18:43:48,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 18:43:48,195 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 18:43:48,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 18:43:48,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 18:43:48,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 18:43:48,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 18:43:48,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 18:43:48,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2024-11-22 18:43:48,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 18:43:48,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 18:43:48,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 18:43:48,423 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 18:43:48,423 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 18:43:48,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2024-11-22 18:43:49,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 18:43:50,072 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 18:43:50,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2024-11-22 18:43:50,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76921c622/dbff4bdc8a4b47789d488d4a3d3cd2d0/FLAG11992fe2f [2024-11-22 18:43:50,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76921c622/dbff4bdc8a4b47789d488d4a3d3cd2d0 [2024-11-22 18:43:50,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 18:43:50,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 18:43:50,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 18:43:50,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 18:43:50,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 18:43:50,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69abb0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50, skipping insertion in model container [2024-11-22 18:43:50,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 18:43:50,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:43:50,469 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 18:43:50,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:43:50,532 INFO L204 MainTranslator]: Completed translation [2024-11-22 18:43:50,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50 WrapperNode [2024-11-22 18:43:50,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 18:43:50,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 18:43:50,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 18:43:50,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 18:43:50,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,599 INFO L138 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 367 [2024-11-22 18:43:50,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 18:43:50,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 18:43:50,600 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 18:43:50,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 18:43:50,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,619 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,643 INFO L175 MemorySlicer]: Split 66 memory accesses to 3 slices as follows [2, 54, 10]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 11 writes are split as follows [0, 6, 5]. [2024-11-22 18:43:50,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 18:43:50,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 18:43:50,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 18:43:50,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 18:43:50,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (1/1) ... [2024-11-22 18:43:50,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:43:50,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:43:50,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 18:43:50,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 18:43:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 18:43:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 18:43:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 18:43:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 18:43:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 18:43:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 18:43:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 18:43:50,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 18:43:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-22 18:43:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-22 18:43:50,916 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 18:43:50,918 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 18:43:51,493 INFO L? ?]: Removed 360 outVars from TransFormulas that were not future-live. [2024-11-22 18:43:51,493 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 18:43:51,517 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 18:43:51,518 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-22 18:43:51,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:43:51 BoogieIcfgContainer [2024-11-22 18:43:51,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 18:43:51,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 18:43:51,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 18:43:51,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 18:43:51,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:43:50" (1/3) ... [2024-11-22 18:43:51,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19423827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:43:51, skipping insertion in model container [2024-11-22 18:43:51,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:50" (2/3) ... [2024-11-22 18:43:51,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19423827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:43:51, skipping insertion in model container [2024-11-22 18:43:51,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:43:51" (3/3) ... [2024-11-22 18:43:51,527 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2024-11-22 18:43:51,543 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 18:43:51,543 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2024-11-22 18:43:51,594 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 18:43:51,600 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;@5f18e87b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 18:43:51,600 INFO L334 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2024-11-22 18:43:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 312 states have internal predecessors, (345), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-22 18:43:51,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:51,609 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-22 18:43:51,610 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:51,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-22 18:43:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:51,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119149996] [2024-11-22 18:43:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:51,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119149996] [2024-11-22 18:43:51,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119149996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:51,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:51,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790322969] [2024-11-22 18:43:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:51,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:51,807 INFO L87 Difference]: Start difference. First operand has 326 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 312 states have internal predecessors, (345), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:52,160 INFO L93 Difference]: Finished difference Result 550 states and 604 transitions. [2024-11-22 18:43:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-22 18:43:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:52,171 INFO L225 Difference]: With dead ends: 550 [2024-11-22 18:43:52,171 INFO L226 Difference]: Without dead ends: 548 [2024-11-22 18:43:52,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,175 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 243 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:52,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 453 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:43:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-22 18:43:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 410. [2024-11-22 18:43:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 250 states have (on average 2.076) internal successors, (519), 396 states have internal predecessors, (519), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2024-11-22 18:43:52,228 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 3 [2024-11-22 18:43:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:52,229 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2024-11-22 18:43:52,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2024-11-22 18:43:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-22 18:43:52,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:52,230 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-22 18:43:52,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 18:43:52,230 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:52,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-22 18:43:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:52,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946045468] [2024-11-22 18:43:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946045468] [2024-11-22 18:43:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946045468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:52,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:52,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:52,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071294797] [2024-11-22 18:43:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:52,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,329 INFO L87 Difference]: Start difference. First operand 410 states and 547 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:52,473 INFO L93 Difference]: Finished difference Result 411 states and 550 transitions. [2024-11-22 18:43:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-22 18:43:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:52,475 INFO L225 Difference]: With dead ends: 411 [2024-11-22 18:43:52,475 INFO L226 Difference]: Without dead ends: 411 [2024-11-22 18:43:52,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,476 INFO L432 NwaCegarLoop]: 354 mSDtfsCounter, 6 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:52,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-22 18:43:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2024-11-22 18:43:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 250 states have (on average 2.068) internal successors, (517), 394 states have internal predecessors, (517), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 545 transitions. [2024-11-22 18:43:52,489 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 545 transitions. Word has length 3 [2024-11-22 18:43:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:52,490 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 545 transitions. [2024-11-22 18:43:52,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 545 transitions. [2024-11-22 18:43:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:43:52,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:52,490 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:52,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 18:43:52,491 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:52,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1117393141, now seen corresponding path program 1 times [2024-11-22 18:43:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:52,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792527490] [2024-11-22 18:43:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:52,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792527490] [2024-11-22 18:43:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792527490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:52,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087226344] [2024-11-22 18:43:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:52,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,559 INFO L87 Difference]: Start difference. First operand 408 states and 545 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:52,693 INFO L93 Difference]: Finished difference Result 403 states and 540 transitions. [2024-11-22 18:43:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-22 18:43:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:52,696 INFO L225 Difference]: With dead ends: 403 [2024-11-22 18:43:52,696 INFO L226 Difference]: Without dead ends: 403 [2024-11-22 18:43:52,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,697 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 35 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:52,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 518 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-22 18:43:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2024-11-22 18:43:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 250 states have (on average 2.048) internal successors, (512), 389 states have internal predecessors, (512), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 540 transitions. [2024-11-22 18:43:52,708 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 540 transitions. Word has length 10 [2024-11-22 18:43:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:52,708 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 540 transitions. [2024-11-22 18:43:52,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 540 transitions. [2024-11-22 18:43:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:43:52,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:52,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:52,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 18:43:52,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:52,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1117393142, now seen corresponding path program 1 times [2024-11-22 18:43:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175244730] [2024-11-22 18:43:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:52,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:52,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175244730] [2024-11-22 18:43:52,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175244730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:52,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:52,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549941972] [2024-11-22 18:43:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:52,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,791 INFO L87 Difference]: Start difference. First operand 403 states and 540 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:52,911 INFO L93 Difference]: Finished difference Result 398 states and 535 transitions. [2024-11-22 18:43:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-22 18:43:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:52,913 INFO L225 Difference]: With dead ends: 398 [2024-11-22 18:43:52,913 INFO L226 Difference]: Without dead ends: 398 [2024-11-22 18:43:52,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:52,914 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 35 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:52,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 531 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-22 18:43:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2024-11-22 18:43:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 250 states have (on average 2.028) internal successors, (507), 384 states have internal predecessors, (507), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 535 transitions. [2024-11-22 18:43:52,927 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 535 transitions. Word has length 10 [2024-11-22 18:43:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:52,927 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 535 transitions. [2024-11-22 18:43:52,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 535 transitions. [2024-11-22 18:43:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:43:52,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:52,928 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:52,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 18:43:52,928 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:52,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 279449431, now seen corresponding path program 1 times [2024-11-22 18:43:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850350373] [2024-11-22 18:43:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:52,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:53,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850350373] [2024-11-22 18:43:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850350373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:53,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:43:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419997192] [2024-11-22 18:43:53,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:53,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:43:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:43:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:43:53,079 INFO L87 Difference]: Start difference. First operand 398 states and 535 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:53,504 INFO L93 Difference]: Finished difference Result 525 states and 577 transitions. [2024-11-22 18:43:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:43:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-22 18:43:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:53,506 INFO L225 Difference]: With dead ends: 525 [2024-11-22 18:43:53,506 INFO L226 Difference]: Without dead ends: 525 [2024-11-22 18:43:53,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:43:53,507 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 324 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:53,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 658 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 18:43:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-22 18:43:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2024-11-22 18:43:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.996) internal successors, (499), 376 states have internal predecessors, (499), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 527 transitions. [2024-11-22 18:43:53,515 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 527 transitions. Word has length 11 [2024-11-22 18:43:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:53,515 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 527 transitions. [2024-11-22 18:43:53,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 527 transitions. [2024-11-22 18:43:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:43:53,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:53,516 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:53,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 18:43:53,517 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:53,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 279449432, now seen corresponding path program 1 times [2024-11-22 18:43:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188251613] [2024-11-22 18:43:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188251613] [2024-11-22 18:43:53,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188251613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:53,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:53,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:43:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489237954] [2024-11-22 18:43:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:53,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:43:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:43:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:43:53,648 INFO L87 Difference]: Start difference. First operand 390 states and 527 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,157 INFO L93 Difference]: Finished difference Result 517 states and 568 transitions. [2024-11-22 18:43:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 18:43:54,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-22 18:43:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,159 INFO L225 Difference]: With dead ends: 517 [2024-11-22 18:43:54,159 INFO L226 Difference]: Without dead ends: 517 [2024-11-22 18:43:54,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:43:54,160 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 794 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:54,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 468 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 18:43:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2024-11-22 18:43:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 381. [2024-11-22 18:43:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 250 states have (on average 1.956) internal successors, (489), 367 states have internal predecessors, (489), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 18:43:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 517 transitions. [2024-11-22 18:43:54,168 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 517 transitions. Word has length 11 [2024-11-22 18:43:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,168 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 517 transitions. [2024-11-22 18:43:54,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 517 transitions. [2024-11-22 18:43:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-22 18:43:54,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,169 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 18:43:54,169 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:54,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1072685968, now seen corresponding path program 1 times [2024-11-22 18:43:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118932714] [2024-11-22 18:43:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118932714] [2024-11-22 18:43:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118932714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:54,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:54,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 18:43:54,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120851595] [2024-11-22 18:43:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:54,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 18:43:54,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 18:43:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:43:54,446 INFO L87 Difference]: Start difference. First operand 381 states and 517 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,558 INFO L93 Difference]: Finished difference Result 403 states and 542 transitions. [2024-11-22 18:43:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 18:43:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-22 18:43:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,560 INFO L225 Difference]: With dead ends: 403 [2024-11-22 18:43:54,560 INFO L226 Difference]: Without dead ends: 403 [2024-11-22 18:43:54,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-22 18:43:54,561 INFO L432 NwaCegarLoop]: 319 mSDtfsCounter, 35 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:54,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1879 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-22 18:43:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 389. [2024-11-22 18:43:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2024-11-22 18:43:54,571 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 20 [2024-11-22 18:43:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,571 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2024-11-22 18:43:54,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2024-11-22 18:43:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 18:43:54,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,572 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 18:43:54,573 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:54,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1874624237, now seen corresponding path program 1 times [2024-11-22 18:43:54,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320922236] [2024-11-22 18:43:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320922236] [2024-11-22 18:43:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320922236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 18:43:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438910552] [2024-11-22 18:43:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:54,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 18:43:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 18:43:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:43:54,808 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,947 INFO L93 Difference]: Finished difference Result 396 states and 533 transitions. [2024-11-22 18:43:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 18:43:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-22 18:43:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,948 INFO L225 Difference]: With dead ends: 396 [2024-11-22 18:43:54,948 INFO L226 Difference]: Without dead ends: 396 [2024-11-22 18:43:54,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-22 18:43:54,949 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 279 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:54,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1865 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-22 18:43:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 392. [2024-11-22 18:43:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 260 states have (on average 1.9230769230769231) internal successors, (500), 377 states have internal predecessors, (500), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 530 transitions. [2024-11-22 18:43:54,957 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 530 transitions. Word has length 22 [2024-11-22 18:43:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,957 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 530 transitions. [2024-11-22 18:43:54,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:43:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 530 transitions. [2024-11-22 18:43:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 18:43:54,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,959 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 18:43:54,959 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:54,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash -271188316, now seen corresponding path program 1 times [2024-11-22 18:43:54,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676144771] [2024-11-22 18:43:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676144771] [2024-11-22 18:43:55,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676144771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:43:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718260626] [2024-11-22 18:43:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:55,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:43:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:43:55,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:43:55,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 18:43:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:55,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 18:43:55,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:43:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 18:43:55,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 18:43:55,924 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-22 18:43:55,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-22 18:43:55,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-22 18:43:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:55,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:43:56,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2024-11-22 18:43:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:56,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718260626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:43:56,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:43:56,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 18 [2024-11-22 18:43:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383342981] [2024-11-22 18:43:56,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:43:56,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 18:43:56,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 18:43:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-22 18:43:56,682 INFO L87 Difference]: Start difference. First operand 392 states and 530 transitions. Second operand has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:43:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:57,816 INFO L93 Difference]: Finished difference Result 533 states and 585 transitions. [2024-11-22 18:43:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 18:43:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-22 18:43:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:57,818 INFO L225 Difference]: With dead ends: 533 [2024-11-22 18:43:57,818 INFO L226 Difference]: Without dead ends: 533 [2024-11-22 18:43:57,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-22 18:43:57,819 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 598 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:57,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 2068 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-22 18:43:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-11-22 18:43:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 397. [2024-11-22 18:43:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 265 states have (on average 1.9018867924528302) internal successors, (504), 382 states have internal predecessors, (504), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2024-11-22 18:43:57,826 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 38 [2024-11-22 18:43:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:57,827 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2024-11-22 18:43:57,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:43:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2024-11-22 18:43:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 18:43:57,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:57,828 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:57,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 18:43:58,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:43:58,033 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:43:58,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -271188315, now seen corresponding path program 1 times [2024-11-22 18:43:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:58,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802537280] [2024-11-22 18:43:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802537280] [2024-11-22 18:43:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802537280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:43:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190799824] [2024-11-22 18:43:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:59,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:43:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:43:59,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:43:59,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 18:43:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:59,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-22 18:43:59,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:43:59,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 18:43:59,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 18:43:59,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 18:43:59,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-22 18:43:59,453 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-22 18:43:59,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-22 18:43:59,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-22 18:43:59,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-22 18:43:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:43:59,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:43:59,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-22 18:43:59,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2024-11-22 18:43:59,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 94 [2024-11-22 18:44:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:44:00,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190799824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:44:00,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:44:00,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 29 [2024-11-22 18:44:00,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196388862] [2024-11-22 18:44:00,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:44:00,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 18:44:00,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 18:44:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2024-11-22 18:44:00,116 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:44:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:02,865 INFO L93 Difference]: Finished difference Result 541 states and 594 transitions. [2024-11-22 18:44:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 18:44:02,866 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-22 18:44:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:02,868 INFO L225 Difference]: With dead ends: 541 [2024-11-22 18:44:02,868 INFO L226 Difference]: Without dead ends: 541 [2024-11-22 18:44:02,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1967, Unknown=0, NotChecked=0, Total=2352 [2024-11-22 18:44:02,869 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 1411 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3600 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:02,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 2068 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3600 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-22 18:44:02,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-22 18:44:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 396. [2024-11-22 18:44:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 265 states have (on average 1.8981132075471698) internal successors, (503), 381 states have internal predecessors, (503), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:44:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 533 transitions. [2024-11-22 18:44:02,876 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 533 transitions. Word has length 38 [2024-11-22 18:44:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:02,876 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 533 transitions. [2024-11-22 18:44:02,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:44:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 533 transitions. [2024-11-22 18:44:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-22 18:44:02,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:02,881 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:44:02,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 18:44:03,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 18:44:03,082 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:03,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash -410521290, now seen corresponding path program 1 times [2024-11-22 18:44:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176746471] [2024-11-22 18:44:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 7 proven. 84 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2024-11-22 18:44:03,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:03,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176746471] [2024-11-22 18:44:03,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176746471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:03,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456109704] [2024-11-22 18:44:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:03,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:03,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:44:03,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 18:44:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:03,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-22 18:44:03,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2024-11-22 18:44:03,696 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 18:44:03,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456109704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:44:03,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 18:44:03,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-22 18:44:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047008884] [2024-11-22 18:44:03,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:44:03,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:44:03,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:44:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:44:03,698 INFO L87 Difference]: Start difference. First operand 396 states and 533 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-22 18:44:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:03,707 INFO L93 Difference]: Finished difference Result 397 states and 534 transitions. [2024-11-22 18:44:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:44:03,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 207 [2024-11-22 18:44:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:03,709 INFO L225 Difference]: With dead ends: 397 [2024-11-22 18:44:03,710 INFO L226 Difference]: Without dead ends: 397 [2024-11-22 18:44:03,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:44:03,710 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 0 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:03,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 647 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 18:44:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-22 18:44:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2024-11-22 18:44:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 266 states have (on average 1.894736842105263) internal successors, (504), 382 states have internal predecessors, (504), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:44:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2024-11-22 18:44:03,718 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 207 [2024-11-22 18:44:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:03,718 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2024-11-22 18:44:03,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-22 18:44:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2024-11-22 18:44:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2024-11-22 18:44:03,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:03,723 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:44:03,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 18:44:03,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:03,925 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:03,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash -62401479, now seen corresponding path program 1 times [2024-11-22 18:44:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:03,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876577273] [2024-11-22 18:44:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2024-11-22 18:44:05,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:05,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876577273] [2024-11-22 18:44:05,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876577273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:05,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116327048] [2024-11-22 18:44:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:05,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:05,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:05,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:44:05,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 18:44:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:05,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 18:44:05,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:05,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 18:44:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 337 proven. 13 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-11-22 18:44:05,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:44:05,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2024-11-22 18:44:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2024-11-22 18:44:05,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116327048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:44:05,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:44:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 22 [2024-11-22 18:44:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114912628] [2024-11-22 18:44:05,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:44:05,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 18:44:05,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 18:44:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-22 18:44:05,871 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 20 states have internal predecessors, (101), 4 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-22 18:44:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:06,437 INFO L93 Difference]: Finished difference Result 392 states and 526 transitions. [2024-11-22 18:44:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 18:44:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 20 states have internal predecessors, (101), 4 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) Word has length 233 [2024-11-22 18:44:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:06,444 INFO L225 Difference]: With dead ends: 392 [2024-11-22 18:44:06,445 INFO L226 Difference]: Without dead ends: 392 [2024-11-22 18:44:06,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 18:44:06,446 INFO L432 NwaCegarLoop]: 296 mSDtfsCounter, 599 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:06,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 2832 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:44:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2024-11-22 18:44:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2024-11-22 18:44:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 259 states have (on average 1.9111969111969112) internal successors, (495), 375 states have internal predecessors, (495), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:44:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 525 transitions. [2024-11-22 18:44:06,455 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 525 transitions. Word has length 233 [2024-11-22 18:44:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:06,456 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 525 transitions. [2024-11-22 18:44:06,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 20 states have internal predecessors, (101), 4 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-22 18:44:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 525 transitions. [2024-11-22 18:44:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-11-22 18:44:06,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:06,460 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:44:06,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 18:44:06,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:06,661 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:06,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:06,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1691751237, now seen corresponding path program 1 times [2024-11-22 18:44:06,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:06,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049671415] [2024-11-22 18:44:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 306 proven. 577 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-11-22 18:44:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049671415] [2024-11-22 18:44:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049671415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763289291] [2024-11-22 18:44:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:15,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:15,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:44:15,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 18:44:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:16,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 289 conjuncts are in the unsatisfiable core [2024-11-22 18:44:16,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:16,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 18:44:16,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2024-11-22 18:44:16,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:44:16,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 16 [2024-11-22 18:44:17,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-22 18:44:17,155 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-22 18:44:17,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-22 18:44:17,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-22 18:44:17,384 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-11-22 18:44:17,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-11-22 18:44:17,579 INFO L349 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2024-11-22 18:44:17,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 48 [2024-11-22 18:44:17,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2024-11-22 18:44:17,826 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2024-11-22 18:44:17,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2024-11-22 18:44:17,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 30 [2024-11-22 18:44:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:44:18,159 INFO L349 Elim1Store]: treesize reduction 179, result has 28.1 percent of original size [2024-11-22 18:44:18,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 54 treesize of output 96 [2024-11-22 18:44:18,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 46 [2024-11-22 18:44:18,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:44:18,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 42 [2024-11-22 18:44:18,488 INFO L349 Elim1Store]: treesize reduction 140, result has 27.8 percent of original size [2024-11-22 18:44:18,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 43 treesize of output 72 [2024-11-22 18:44:18,729 INFO L349 Elim1Store]: treesize reduction 156, result has 35.0 percent of original size [2024-11-22 18:44:18,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 99 [2024-11-22 18:44:18,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 35 [2024-11-22 18:44:25,061 WARN L286 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 1041 DAG size of output: 977 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-22 18:44:25,062 INFO L349 Elim1Store]: treesize reduction 512, result has 80.3 percent of original size [2024-11-22 18:44:25,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 231 case distinctions, treesize of input 526 treesize of output 2543 [2024-11-22 18:44:25,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 753 treesize of output 451