./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.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_test05-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 18:43:49,458 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 18:43:49,513 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 18:43:49,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 18:43:49,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 18:43:49,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 18:43:49,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 18:43:49,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 18:43:49,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 18:43:49,549 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 18:43:49,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 18:43:49,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 18:43:49,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 18:43:49,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 18:43:49,550 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 18:43:49,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 18:43:49,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 18:43:49,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 18:43:49,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 18:43:49,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 18:43:49,554 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 18:43:49,555 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 18:43:49,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 18:43:49,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 18:43:49,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 18:43:49,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 18:43:49,556 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 18:43:49,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 18:43:49,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:43:49,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 18:43:49,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 18:43:49,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 18:43:49,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 18:43:49,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 18:43:49,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 18:43:49,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 18:43:49,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 18:43:49,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2024-11-22 18:43:49,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 18:43:49,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 18:43:49,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 18:43:49,800 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 18:43:49,801 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 18:43:49,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2024-11-22 18:43:51,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 18:43:51,513 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 18:43:51,514 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2024-11-22 18:43:51,524 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9da6aa78/707ab029b7174749bc8ce15243866dc6/FLAG5c76f67a6 [2024-11-22 18:43:51,536 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9da6aa78/707ab029b7174749bc8ce15243866dc6 [2024-11-22 18:43:51,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 18:43:51,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 18:43:51,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 18:43:51,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 18:43:51,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 18:43:51,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:51,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c53c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51, skipping insertion in model container [2024-11-22 18:43:51,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:51,582 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 18:43:51,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:43:51,849 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 18:43:51,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:43:51,972 INFO L204 MainTranslator]: Completed translation [2024-11-22 18:43:51,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51 WrapperNode [2024-11-22 18:43:51,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 18:43:51,973 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 18:43:51,973 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 18:43:51,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 18:43:51,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:51,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,039 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 365 [2024-11-22 18:43:52,039 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 18:43:52,040 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 18:43:52,040 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 18:43:52,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 18:43:52,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,084 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 18:43:52,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,094 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 18:43:52,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 18:43:52,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 18:43:52,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 18:43:52,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (1/1) ... [2024-11-22 18:43:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:43:52,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:43:52,143 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 18:43:52,149 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 18:43:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 18:43:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 18:43:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 18:43:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 18:43:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 18:43:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 18:43:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 18:43:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 18:43:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 18:43:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 18:43:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 18:43:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 18:43:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 18:43:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-22 18:43:52,190 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-22 18:43:52,308 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 18:43:52,310 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 18:43:52,779 INFO L? ?]: Removed 359 outVars from TransFormulas that were not future-live. [2024-11-22 18:43:52,779 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 18:43:52,793 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 18:43:52,793 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-22 18:43:52,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:43:52 BoogieIcfgContainer [2024-11-22 18:43:52,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 18:43:52,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 18:43:52,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 18:43:52,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 18:43:52,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:43:51" (1/3) ... [2024-11-22 18:43:52,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fe3fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:43:52, skipping insertion in model container [2024-11-22 18:43:52,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:43:51" (2/3) ... [2024-11-22 18:43:52,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fe3fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:43:52, skipping insertion in model container [2024-11-22 18:43:52,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:43:52" (3/3) ... [2024-11-22 18:43:52,800 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2024-11-22 18:43:52,811 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 18:43:52,812 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2024-11-22 18:43:52,867 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 18:43:52,872 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;@724ff7eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 18:43:52,873 INFO L334 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2024-11-22 18:43:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 162 states have (on average 2.117283950617284) internal successors, (343), 311 states have internal predecessors, (343), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-22 18:43:52,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:52,884 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-22 18:43:52,884 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 18:43:52,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-22 18:43:52,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:52,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629680271] [2024-11-22 18:43:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:52,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:53,102 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 18:43:53,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629680271] [2024-11-22 18:43:53,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629680271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:53,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279034142] [2024-11-22 18:43:53,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:53,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:53,134 INFO L87 Difference]: Start difference. First operand has 326 states, 162 states have (on average 2.117283950617284) internal successors, (343), 311 states have internal predecessors, (343), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) 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 18:43:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:53,561 INFO L93 Difference]: Finished difference Result 550 states and 604 transitions. [2024-11-22 18:43:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:53,563 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 18:43:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:53,571 INFO L225 Difference]: With dead ends: 550 [2024-11-22 18:43:53,571 INFO L226 Difference]: Without dead ends: 548 [2024-11-22 18:43:53,573 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 18:43:53,575 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 243 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 18:43:53,576 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 18:43:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-22 18:43:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 410. [2024-11-22 18:43:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 249 states have (on average 2.076305220883534) internal successors, (517), 395 states have internal predecessors, (517), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2024-11-22 18:43:53,620 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 3 [2024-11-22 18:43:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:53,620 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2024-11-22 18:43:53,621 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 18:43:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2024-11-22 18:43:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-22 18:43:53,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:53,621 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-22 18:43:53,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 18:43:53,622 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 18:43:53,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:53,622 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-22 18:43:53,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:53,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705563615] [2024-11-22 18:43:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:53,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:53,676 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 18:43:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705563615] [2024-11-22 18:43:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705563615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:53,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:53,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411239679] [2024-11-22 18:43:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:53,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:53,680 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 18:43:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:53,841 INFO L93 Difference]: Finished difference Result 411 states and 550 transitions. [2024-11-22 18:43:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:53,841 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 18:43:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:53,843 INFO L225 Difference]: With dead ends: 411 [2024-11-22 18:43:53,843 INFO L226 Difference]: Without dead ends: 411 [2024-11-22 18:43:53,844 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 18:43:53,846 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 18:43:53,847 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 18:43:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-22 18:43:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2024-11-22 18:43:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 249 states have (on average 2.068273092369478) internal successors, (515), 393 states have internal predecessors, (515), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 545 transitions. [2024-11-22 18:43:53,865 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 545 transitions. Word has length 3 [2024-11-22 18:43:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:53,865 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 545 transitions. [2024-11-22 18:43:53,866 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 18:43:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 545 transitions. [2024-11-22 18:43:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:43:53,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:53,866 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:53,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 18:43:53,867 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 18:43:53,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1117389169, now seen corresponding path program 1 times [2024-11-22 18:43:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103261826] [2024-11-22 18:43:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:53,953 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 18:43:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103261826] [2024-11-22 18:43:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103261826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:53,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:53,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595949251] [2024-11-22 18:43:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:53,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:53,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:53,955 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 18:43:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,122 INFO L93 Difference]: Finished difference Result 403 states and 540 transitions. [2024-11-22 18:43:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:54,123 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 18:43:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,124 INFO L225 Difference]: With dead ends: 403 [2024-11-22 18:43:54,124 INFO L226 Difference]: Without dead ends: 403 [2024-11-22 18:43:54,125 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 18:43:54,125 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:54,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 518 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 18:43:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-22 18:43:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2024-11-22 18:43:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 249 states have (on average 2.0481927710843375) internal successors, (510), 388 states have internal predecessors, (510), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 540 transitions. [2024-11-22 18:43:54,139 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 540 transitions. Word has length 10 [2024-11-22 18:43:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,139 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 540 transitions. [2024-11-22 18:43:54,140 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 18:43:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 540 transitions. [2024-11-22 18:43:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:43:54,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,140 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 18:43:54,140 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 18:43:54,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1117389170, now seen corresponding path program 1 times [2024-11-22 18:43:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559988201] [2024-11-22 18:43:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:54,199 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 18:43:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559988201] [2024-11-22 18:43:54,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559988201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:54,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:54,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:43:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530372805] [2024-11-22 18:43:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:54,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:43:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:43:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:43:54,202 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 18:43:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,321 INFO L93 Difference]: Finished difference Result 398 states and 535 transitions. [2024-11-22 18:43:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:43:54,322 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 18:43:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,323 INFO L225 Difference]: With dead ends: 398 [2024-11-22 18:43:54,323 INFO L226 Difference]: Without dead ends: 398 [2024-11-22 18:43:54,324 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 18:43:54,324 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 18:43:54,325 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 18:43:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-22 18:43:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2024-11-22 18:43:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 249 states have (on average 2.0281124497991967) internal successors, (505), 383 states have internal predecessors, (505), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 535 transitions. [2024-11-22 18:43:54,352 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 535 transitions. Word has length 10 [2024-11-22 18:43:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,352 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 535 transitions. [2024-11-22 18:43:54,352 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 18:43:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 535 transitions. [2024-11-22 18:43:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:43:54,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,353 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 18:43:54,353 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 18:43:54,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash 279326295, now seen corresponding path program 1 times [2024-11-22 18:43:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962894983] [2024-11-22 18:43:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:54,445 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 18:43:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:54,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962894983] [2024-11-22 18:43:54,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962894983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:54,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:54,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:43:54,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956362221] [2024-11-22 18:43:54,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:54,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:43:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:43:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:43:54,447 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 18:43:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:54,821 INFO L93 Difference]: Finished difference Result 525 states and 577 transitions. [2024-11-22 18:43:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:43:54,822 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 18:43:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:54,823 INFO L225 Difference]: With dead ends: 525 [2024-11-22 18:43:54,823 INFO L226 Difference]: Without dead ends: 525 [2024-11-22 18:43:54,824 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 18:43:54,824 INFO L432 NwaCegarLoop]: 188 mSDtfsCounter, 324 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:54,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 651 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:43:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-22 18:43:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2024-11-22 18:43:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 249 states have (on average 1.9959839357429718) internal successors, (497), 375 states have internal predecessors, (497), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 527 transitions. [2024-11-22 18:43:54,831 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 527 transitions. Word has length 11 [2024-11-22 18:43:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:54,831 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 527 transitions. [2024-11-22 18:43:54,831 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 18:43:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 527 transitions. [2024-11-22 18:43:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:43:54,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:54,832 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:43:54,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 18:43:54,832 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 18:43:54,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash 279326296, now seen corresponding path program 1 times [2024-11-22 18:43:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:54,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124581489] [2024-11-22 18:43:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:54,962 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 18:43:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:54,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124581489] [2024-11-22 18:43:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124581489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:54,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:54,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:43:54,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253506647] [2024-11-22 18:43:54,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:54,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:43:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:43:54,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:43:54,964 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 18:43:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:55,499 INFO L93 Difference]: Finished difference Result 515 states and 567 transitions. [2024-11-22 18:43:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 18:43:55,500 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 18:43:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:55,501 INFO L225 Difference]: With dead ends: 515 [2024-11-22 18:43:55,501 INFO L226 Difference]: Without dead ends: 515 [2024-11-22 18:43:55,502 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 18:43:55,502 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 791 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:55,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 461 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 18:43:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-22 18:43:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 381. [2024-11-22 18:43:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 366 states have internal predecessors, (487), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:43:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 517 transitions. [2024-11-22 18:43:55,510 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 517 transitions. Word has length 11 [2024-11-22 18:43:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:55,510 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 517 transitions. [2024-11-22 18:43:55,510 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 18:43:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 517 transitions. [2024-11-22 18:43:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-22 18:43:55,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:55,511 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 18:43:55,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 18:43:55,511 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 18:43:55,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1999087244, now seen corresponding path program 1 times [2024-11-22 18:43:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666906908] [2024-11-22 18:43:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:55,726 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 18:43:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:55,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666906908] [2024-11-22 18:43:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666906908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:55,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 18:43:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708706102] [2024-11-22 18:43:55,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:55,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 18:43:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 18:43:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:43:55,728 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 18:43:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:55,905 INFO L93 Difference]: Finished difference Result 403 states and 542 transitions. [2024-11-22 18:43:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 18:43:55,905 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 18:43:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:55,907 INFO L225 Difference]: With dead ends: 403 [2024-11-22 18:43:55,907 INFO L226 Difference]: Without dead ends: 403 [2024-11-22 18:43:55,907 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 18:43:55,911 INFO L432 NwaCegarLoop]: 319 mSDtfsCounter, 35 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1878 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:55,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1878 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-22 18:43:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 389. [2024-11-22 18:43:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 256 states have (on average 1.93359375) internal successors, (495), 373 states have internal predecessors, (495), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:43:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2024-11-22 18:43:55,925 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 20 [2024-11-22 18:43:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:55,926 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2024-11-22 18:43:55,926 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 18:43:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2024-11-22 18:43:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 18:43:55,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:55,930 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 18:43:55,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 18:43:55,931 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 18:43:55,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -661228401, now seen corresponding path program 1 times [2024-11-22 18:43:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:55,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634432092] [2024-11-22 18:43:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:56,295 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 18:43:56,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634432092] [2024-11-22 18:43:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634432092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:43:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:43:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 18:43:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520535377] [2024-11-22 18:43:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:43:56,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 18:43:56,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 18:43:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:43:56,298 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 18:43:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:43:56,492 INFO L93 Difference]: Finished difference Result 394 states and 532 transitions. [2024-11-22 18:43:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 18:43:56,493 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 18:43:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:43:56,495 INFO L225 Difference]: With dead ends: 394 [2024-11-22 18:43:56,495 INFO L226 Difference]: Without dead ends: 394 [2024-11-22 18:43:56,495 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 18:43:56,496 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 275 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:43:56,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1893 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:43:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-22 18:43:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2024-11-22 18:43:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 259 states have (on average 1.9227799227799227) internal successors, (498), 376 states have internal predecessors, (498), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:43:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 530 transitions. [2024-11-22 18:43:56,510 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 530 transitions. Word has length 22 [2024-11-22 18:43:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:43:56,510 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 530 transitions. [2024-11-22 18:43:56,510 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 18:43:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 530 transitions. [2024-11-22 18:43:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 18:43:56,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:43:56,512 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 18:43:56,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 18:43:56,512 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 18:43:56,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:43:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash -614318820, now seen corresponding path program 1 times [2024-11-22 18:43:56,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:43:56,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690962360] [2024-11-22 18:43:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:56,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:43:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:57,023 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 18:43:57,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:43:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690962360] [2024-11-22 18:43:57,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690962360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:43:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528745601] [2024-11-22 18:43:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:43:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:43:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:43:57,030 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 18:43:57,032 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 18:43:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:43:57,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-22 18:43:57,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:43:57,181 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 18:43:57,240 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 18:43:57,266 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 27 treesize of output 22 [2024-11-22 18:43:57,381 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-22 18:43:57,381 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 18:43:57,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:43:57,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-22 18:43:57,512 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 18:43:57,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:43:57,877 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 96 treesize of output 90 [2024-11-22 18:43:58,572 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 18:43:58,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528745601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:43:58,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:43:58,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 22 [2024-11-22 18:43:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623403106] [2024-11-22 18:43:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:43:58,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 18:43:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:43:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 18:43:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-22 18:43:58,575 INFO L87 Difference]: Start difference. First operand 392 states and 530 transitions. Second operand has 23 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 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 18:44:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:00,411 INFO L93 Difference]: Finished difference Result 807 states and 927 transitions. [2024-11-22 18:44:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 18:44:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 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 18:44:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:00,414 INFO L225 Difference]: With dead ends: 807 [2024-11-22 18:44:00,415 INFO L226 Difference]: Without dead ends: 807 [2024-11-22 18:44:00,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 18:44:00,415 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 1141 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:00,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 3068 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-22 18:44:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-11-22 18:44:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 397. [2024-11-22 18:44:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 264 states have (on average 1.9015151515151516) internal successors, (502), 381 states have internal predecessors, (502), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:44:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2024-11-22 18:44:00,426 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 38 [2024-11-22 18:44:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:00,426 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2024-11-22 18:44:00,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 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 18:44:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2024-11-22 18:44:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 18:44:00,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:00,427 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 18:44:00,442 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 18:44:00,631 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 18:44:00,632 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 18:44:00,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -614318819, now seen corresponding path program 1 times [2024-11-22 18:44:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:00,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502475243] [2024-11-22 18:44:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:01,825 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 18:44:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502475243] [2024-11-22 18:44:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502475243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006644279] [2024-11-22 18:44:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:01,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:01,828 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 18:44:01,835 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 18:44:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:01,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 18:44:01,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:01,952 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 18:44:01,956 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 18:44:02,036 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 18:44:02,072 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 36 treesize of output 27 [2024-11-22 18:44:02,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-22 18:44:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:02,190 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 18:44:02,200 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-22 18:44:02,200 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 18:44:02,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2024-11-22 18:44:02,281 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 18:44:02,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:44:02,643 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 18:44:02,665 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 18:44:02,731 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 104 treesize of output 98 [2024-11-22 18:44:02,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-22 18:44:03,941 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 18:44:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006644279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:44:03,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:44:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 6] total 29 [2024-11-22 18:44:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277796206] [2024-11-22 18:44:03,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:44:03,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 18:44:03,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 18:44:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2024-11-22 18:44:03,943 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 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 18:44:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:07,892 INFO L93 Difference]: Finished difference Result 823 states and 945 transitions. [2024-11-22 18:44:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 18:44:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 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 18:44:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:07,896 INFO L225 Difference]: With dead ends: 823 [2024-11-22 18:44:07,896 INFO L226 Difference]: Without dead ends: 823 [2024-11-22 18:44:07,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2024-11-22 18:44:07,898 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 1519 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:07,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 2515 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-22 18:44:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2024-11-22 18:44:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 396. [2024-11-22 18:44:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 264 states have (on average 1.8977272727272727) internal successors, (501), 380 states have internal predecessors, (501), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:44:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 533 transitions. [2024-11-22 18:44:07,908 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 533 transitions. Word has length 38 [2024-11-22 18:44:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:07,908 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 533 transitions. [2024-11-22 18:44:07,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 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 18:44:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 533 transitions. [2024-11-22 18:44:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-22 18:44:07,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:07,913 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1] [2024-11-22 18:44:07,920 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 18:44:08,116 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 18:44:08,117 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:08,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 429211247, now seen corresponding path program 1 times [2024-11-22 18:44:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026368099] [2024-11-22 18:44:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2024-11-22 18:44:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026368099] [2024-11-22 18:44:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026368099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624058544] [2024-11-22 18:44:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:08,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:08,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:08,313 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 18:44:08,314 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 18:44:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:08,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-22 18:44:08,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2024-11-22 18:44:08,733 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 18:44:08,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624058544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:44:08,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 18:44:08,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-22 18:44:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978320078] [2024-11-22 18:44:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:44:08,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:44:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:44:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:44:08,735 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-22 18:44:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:08,748 INFO L93 Difference]: Finished difference Result 397 states and 534 transitions. [2024-11-22 18:44:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:44:08,748 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 220 [2024-11-22 18:44:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:08,749 INFO L225 Difference]: With dead ends: 397 [2024-11-22 18:44:08,749 INFO L226 Difference]: Without dead ends: 397 [2024-11-22 18:44:08,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 221 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 18:44:08,750 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 18:44:08,750 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 18:44:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-22 18:44:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2024-11-22 18:44:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 265 states have (on average 1.8943396226415095) internal successors, (502), 381 states have internal predecessors, (502), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:44:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2024-11-22 18:44:08,757 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 220 [2024-11-22 18:44:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:08,758 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2024-11-22 18:44:08,758 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-22 18:44:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2024-11-22 18:44:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-22 18:44:08,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:08,760 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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 18:44:08,770 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 18:44:08,963 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 18:44:08,965 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:08,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1280846347, now seen corresponding path program 1 times [2024-11-22 18:44:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733150789] [2024-11-22 18:44:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 1 proven. 364 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2024-11-22 18:44:10,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733150789] [2024-11-22 18:44:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733150789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580188652] [2024-11-22 18:44:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:10,187 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 18:44:10,188 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 18:44:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:10,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 2233 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 18:44:10,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:10,657 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 18:44:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 521 proven. 13 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2024-11-22 18:44:10,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:44:10,908 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 18:44:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 325 proven. 40 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2024-11-22 18:44:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580188652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:44:10,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:44:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 22 [2024-11-22 18:44:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343302038] [2024-11-22 18:44:10,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:44:10,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 18:44:10,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 18:44:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-22 18:44:10,975 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2024-11-22 18:44:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:44:11,544 INFO L93 Difference]: Finished difference Result 390 states and 525 transitions. [2024-11-22 18:44:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 18:44:11,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 248 [2024-11-22 18:44:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:44:11,546 INFO L225 Difference]: With dead ends: 390 [2024-11-22 18:44:11,546 INFO L226 Difference]: Without dead ends: 390 [2024-11-22 18:44:11,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 493 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 18:44:11,547 INFO L432 NwaCegarLoop]: 295 mSDtfsCounter, 587 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 3909 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:44:11,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 3909 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:44:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-11-22 18:44:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2024-11-22 18:44:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 258 states have (on average 1.9108527131782946) internal successors, (493), 374 states have internal predecessors, (493), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:44:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 525 transitions. [2024-11-22 18:44:11,558 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 525 transitions. Word has length 248 [2024-11-22 18:44:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:44:11,560 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 525 transitions. [2024-11-22 18:44:11,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2024-11-22 18:44:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 525 transitions. [2024-11-22 18:44:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-11-22 18:44:11,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:44:11,562 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:44:11,580 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 18:44:11,766 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 18:44:11,767 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2024-11-22 18:44:11,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:44:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1408657229, now seen corresponding path program 1 times [2024-11-22 18:44:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:44:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585993134] [2024-11-22 18:44:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:44:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 70 proven. 986 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2024-11-22 18:44:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:44:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585993134] [2024-11-22 18:44:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585993134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543558419] [2024-11-22 18:44:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:44:26,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:44:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:44:26,616 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 18:44:26,617 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 18:44:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:44:27,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 415 conjuncts are in the unsatisfiable core [2024-11-22 18:44:27,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:44:27,350 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 18:44:27,354 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 18:44:27,382 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 18:44:27,386 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 21 treesize of output 20 [2024-11-22 18:44:27,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:44:27,704 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 36 treesize of output 14 [2024-11-22 18:44:27,708 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 55 treesize of output 21 [2024-11-22 18:44:27,933 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 27 treesize of output 11 [2024-11-22 18:44:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:27,938 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 30 treesize of output 13 [2024-11-22 18:44:27,953 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2024-11-22 18:44:27,954 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 33 treesize of output 41 [2024-11-22 18:44:27,959 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 52 treesize of output 28 [2024-11-22 18:44:28,224 INFO L349 Elim1Store]: treesize reduction 90, result has 36.2 percent of original size [2024-11-22 18:44:28,225 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 44 treesize of output 71 [2024-11-22 18:44:28,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-22 18:44:28,234 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 93 treesize of output 47 [2024-11-22 18:44:28,247 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 27 treesize of output 11 [2024-11-22 18:44:28,504 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 27 treesize of output 11 [2024-11-22 18:44:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:28,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-22 18:44:28,550 INFO L349 Elim1Store]: treesize reduction 120, result has 35.5 percent of original size [2024-11-22 18:44:28,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 89 [2024-11-22 18:44:28,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 55 [2024-11-22 18:44:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:28,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-22 18:44:29,017 INFO L349 Elim1Store]: treesize reduction 182, result has 30.8 percent of original size [2024-11-22 18:44:29,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 96 [2024-11-22 18:44:29,026 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 129 treesize of output 63 [2024-11-22 18:44:29,061 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 27 treesize of output 11 [2024-11-22 18:44:29,456 INFO L349 Elim1Store]: treesize reduction 132, result has 34.3 percent of original size [2024-11-22 18:44:29,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 48 treesize of output 95 [2024-11-22 18:44:29,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-22 18:44:29,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 56 [2024-11-22 18:44:29,516 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 27 treesize of output 11 [2024-11-22 18:44:30,009 INFO L349 Elim1Store]: treesize reduction 220, result has 30.4 percent of original size [2024-11-22 18:44:30,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 114 [2024-11-22 18:44:30,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-22 18:44:30,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 71 [2024-11-22 18:44:30,086 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 27 treesize of output 11 [2024-11-22 18:44:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:30,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2024-11-22 18:44:30,867 INFO L349 Elim1Store]: treesize reduction 162, result has 34.1 percent of original size [2024-11-22 18:44:30,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 113 [2024-11-22 18:44:30,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 64 [2024-11-22 18:44:30,950 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 27 treesize of output 11 [2024-11-22 18:44:31,369 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 27 treesize of output 11 [2024-11-22 18:44:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:31,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2024-11-22 18:44:31,474 INFO L349 Elim1Store]: treesize reduction 210, result has 34.6 percent of original size [2024-11-22 18:44:31,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 64 treesize of output 143 [2024-11-22 18:44:31,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 84 [2024-11-22 18:44:32,087 INFO L349 Elim1Store]: treesize reduction 240, result has 34.4 percent of original size [2024-11-22 18:44:32,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 161 [2024-11-22 18:44:32,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 46 [2024-11-22 18:44:32,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 92 [2024-11-22 18:44:32,225 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 27 treesize of output 11 [2024-11-22 18:44:32,996 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 27 treesize of output 11 [2024-11-22 18:44:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:33,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 26 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2024-11-22 18:44:33,193 INFO L349 Elim1Store]: treesize reduction 270, result has 34.3 percent of original size [2024-11-22 18:44:33,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 179 [2024-11-22 18:44:33,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 100 [2024-11-22 18:44:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:36,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:36,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 35 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 51 [2024-11-22 18:44:36,800 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 200 treesize of output 88 [2024-11-22 18:44:36,864 INFO L349 Elim1Store]: treesize reduction 36, result has 72.5 percent of original size [2024-11-22 18:44:36,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 125 [2024-11-22 18:44:36,912 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 27 treesize of output 11 [2024-11-22 18:44:37,042 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 18:44:37,331 INFO L349 Elim1Store]: treesize reduction 118, result has 31.4 percent of original size [2024-11-22 18:44:37,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 80 [2024-11-22 18:44:37,344 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 129 treesize of output 59 [2024-11-22 18:44:37,398 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 27 treesize of output 11 [2024-11-22 18:44:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:44:38,063 INFO L349 Elim1Store]: treesize reduction 192, result has 22.0 percent of original size [2024-11-22 18:44:38,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 94 [2024-11-22 18:44:38,075 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 97 treesize of output 49 [2024-11-22 18:44:38,088 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-22 18:44:38,088 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 18:44:38,154 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 27 treesize of output 11 [2024-11-22 18:44:38,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 34 [2024-11-22 18:44:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 548 proven. 804 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-22 18:44:38,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:44:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543558419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:44:38,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 18:44:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 42] total 55 [2024-11-22 18:44:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051259652] [2024-11-22 18:44:38,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 18:44:38,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-22 18:44:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:44:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-22 18:44:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2024-11-22 18:44:38,861 INFO L87 Difference]: Start difference. First operand 390 states and 525 transitions. Second operand has 56 states, 46 states have (on average 4.5) internal successors, (207), 44 states have internal predecessors, (207), 16 states have call successors, (28), 4 states have call predecessors, (28), 14 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2024-11-22 18:44:49,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:44:54,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:45:01,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:45:05,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:45:16,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]