./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.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 e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 14:58:56,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 14:58:56,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 14:58:56,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 14:58:56,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 14:58:56,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 14:58:56,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 14:58:56,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 14:58:56,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 14:58:56,699 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 14:58:56,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 14:58:56,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 14:58:56,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 14:58:56,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 14:58:56,702 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 14:58:56,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 14:58:56,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 14:58:56,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 14:58:56,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 14:58:56,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 14:58:56,703 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 14:58:56,705 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 14:58:56,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 14:58:56,706 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 14:58:56,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 14:58:56,706 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 14:58:56,706 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 14:58:56,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 14:58:56,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:58:56,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 14:58:56,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 14:58:56,708 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 14:58:56,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 14:58:56,709 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 14:58:56,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 14:58:56,709 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 14:58:56,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 14:58:56,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2024-11-20 14:58:56,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 14:58:56,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 14:58:56,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 14:58:56,918 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 14:58:56,918 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 14:58:56,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-20 14:58:58,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 14:58:58,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 14:58:58,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-20 14:58:58,404 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6451a6e2e/e20cd3bfecbe47fba979e05a7af9cdcf/FLAG149eeda52 [2024-11-20 14:58:58,416 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6451a6e2e/e20cd3bfecbe47fba979e05a7af9cdcf [2024-11-20 14:58:58,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 14:58:58,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 14:58:58,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 14:58:58,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 14:58:58,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 14:58:58,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4cab46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58, skipping insertion in model container [2024-11-20 14:58:58,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,463 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 14:58:58,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:58:58,776 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 14:58:58,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:58:58,839 INFO L204 MainTranslator]: Completed translation [2024-11-20 14:58:58,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58 WrapperNode [2024-11-20 14:58:58,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 14:58:58,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 14:58:58,842 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 14:58:58,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 14:58:58,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,862 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,879 INFO L138 Inliner]: procedures = 127, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 110 [2024-11-20 14:58:58,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 14:58:58,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 14:58:58,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 14:58:58,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 14:58:58,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,890 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,910 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-20 14:58:58,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,922 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 14:58:58,926 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 14:58:58,926 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 14:58:58,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 14:58:58,927 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (1/1) ... [2024-11-20 14:58:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:58:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:58:58,961 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) [2024-11-20 14:58:58,968 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 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 14:58:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 14:58:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-20 14:58:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-20 14:58:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 14:58:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 14:58:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 14:58:59,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-20 14:58:59,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-20 14:58:59,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-20 14:58:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-20 14:58:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 14:58:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 14:58:59,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 14:58:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 14:58:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 14:58:59,125 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 14:58:59,127 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 14:58:59,353 INFO L? ?]: Removed 82 outVars from TransFormulas that were not future-live. [2024-11-20 14:58:59,354 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 14:58:59,366 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 14:58:59,367 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 14:58:59,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:58:59 BoogieIcfgContainer [2024-11-20 14:58:59,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 14:58:59,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 14:58:59,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 14:58:59,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 14:58:59,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:58:58" (1/3) ... [2024-11-20 14:58:59,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa3d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:58:59, skipping insertion in model container [2024-11-20 14:58:59,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:58:58" (2/3) ... [2024-11-20 14:58:59,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa3d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:58:59, skipping insertion in model container [2024-11-20 14:58:59,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:58:59" (3/3) ... [2024-11-20 14:58:59,372 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2024-11-20 14:58:59,385 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 14:58:59,386 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-20 14:58:59,418 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 14:58:59,423 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;@1aeafdde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 14:58:59,423 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-20 14:58:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:58:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:58:59,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:58:59,432 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:58:59,432 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:58:59,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:58:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1813319865, now seen corresponding path program 1 times [2024-11-20 14:58:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:58:59,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687703742] [2024-11-20 14:58:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:58:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:58:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:58:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:58:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:58:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687703742] [2024-11-20 14:58:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687703742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:58:59,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:58:59,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:58:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463568705] [2024-11-20 14:58:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:58:59,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:58:59,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:58:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:58:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:58:59,671 INFO L87 Difference]: Start difference. First operand has 76 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-20 14:58:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:58:59,795 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-20 14:58:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:58:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-20 14:58:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:58:59,805 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:58:59,806 INFO L226 Difference]: Without dead ends: 70 [2024-11-20 14:58:59,808 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 [2024-11-20 14:58:59,811 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:58:59,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:58:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-20 14:58:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-20 14:58:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:58:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-11-20 14:58:59,849 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 7 [2024-11-20 14:58:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:58:59,850 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-11-20 14:58:59,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-20 14:58:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-11-20 14:58:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:58:59,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:58:59,851 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:58:59,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 14:58:59,852 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:58:59,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:58:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1813319866, now seen corresponding path program 1 times [2024-11-20 14:58:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:58:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608343399] [2024-11-20 14:58:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:58:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:58:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:58:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:58:59,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:58:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608343399] [2024-11-20 14:58:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608343399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:58:59,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:58:59,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:58:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599515704] [2024-11-20 14:58:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:58:59,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:58:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:58:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:58:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:58:59,980 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-20 14:59:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:00,024 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2024-11-20 14:59:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:59:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-20 14:59:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:00,027 INFO L225 Difference]: With dead ends: 68 [2024-11-20 14:59:00,027 INFO L226 Difference]: Without dead ends: 68 [2024-11-20 14:59:00,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:59:00,028 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:00,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:59:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-20 14:59:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-20 14:59:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.619047619047619) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-11-20 14:59:00,038 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2024-11-20 14:59:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:00,038 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-11-20 14:59:00,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-20 14:59:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-11-20 14:59:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:59:00,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:00,039 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:00,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 14:59:00,040 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:00,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1910914624, now seen corresponding path program 1 times [2024-11-20 14:59:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:00,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438741197] [2024-11-20 14:59:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:00,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:59:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438741197] [2024-11-20 14:59:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438741197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:00,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:00,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:59:00,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987131146] [2024-11-20 14:59:00,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:00,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:59:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:59:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:00,244 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:00,387 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-20 14:59:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-20 14:59:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:00,389 INFO L225 Difference]: With dead ends: 67 [2024-11-20 14:59:00,389 INFO L226 Difference]: Without dead ends: 67 [2024-11-20 14:59:00,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:00,390 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:00,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-20 14:59:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-20 14:59:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-20 14:59:00,395 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 13 [2024-11-20 14:59:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:00,396 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-20 14:59:00,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-20 14:59:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:59:00,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:00,398 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:00,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 14:59:00,398 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:00,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1910914623, now seen corresponding path program 1 times [2024-11-20 14:59:00,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:00,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884992824] [2024-11-20 14:59:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:00,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:59:00,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:00,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884992824] [2024-11-20 14:59:00,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884992824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:00,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:59:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992521952] [2024-11-20 14:59:00,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:00,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:59:00,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:59:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:00,610 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:00,741 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-20 14:59:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-20 14:59:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:00,746 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:59:00,746 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:59:00,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:00,747 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:00,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 255 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:59:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-20 14:59:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-20 14:59:00,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 13 [2024-11-20 14:59:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:00,754 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-20 14:59:00,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-20 14:59:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-20 14:59:00,755 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:00,755 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:00,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 14:59:00,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:00,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1821850304, now seen corresponding path program 1 times [2024-11-20 14:59:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:00,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99840251] [2024-11-20 14:59:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:00,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-20 14:59:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:59:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99840251] [2024-11-20 14:59:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99840251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:59:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076316669] [2024-11-20 14:59:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:00,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:59:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:59:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:59:00,850 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:00,901 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-20 14:59:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:59:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-20 14:59:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:00,902 INFO L225 Difference]: With dead ends: 72 [2024-11-20 14:59:00,902 INFO L226 Difference]: Without dead ends: 72 [2024-11-20 14:59:00,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:59:00,903 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:00,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:59:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-20 14:59:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-11-20 14:59:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.558139534883721) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-20 14:59:00,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 15 [2024-11-20 14:59:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:00,917 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-20 14:59:00,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-20 14:59:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-20 14:59:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-20 14:59:00,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:00,918 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:00,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 14:59:00,919 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:00,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash -411483326, now seen corresponding path program 1 times [2024-11-20 14:59:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:00,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066873512] [2024-11-20 14:59:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-20 14:59:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:59:01,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066873512] [2024-11-20 14:59:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066873512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657385765] [2024-11-20 14:59:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:01,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:01,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:01,043 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) [2024-11-20 14:59:01,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 14:59:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 14:59:01,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:59:01,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:59:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657385765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:59:01,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:59:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-11-20 14:59:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935337710] [2024-11-20 14:59:01,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:01,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:59:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:59:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:59:01,231 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-20 14:59:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:01,291 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-20 14:59:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:59:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-20 14:59:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:01,292 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:59:01,292 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:59:01,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:59:01,294 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:01,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 225 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:59:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-20 14:59:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.5) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-11-20 14:59:01,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 28 [2024-11-20 14:59:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:01,304 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-11-20 14:59:01,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-20 14:59:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-11-20 14:59:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:59:01,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:01,305 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:01,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 14:59:01,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 14:59:01,506 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:01,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1287953920, now seen corresponding path program 2 times [2024-11-20 14:59:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:01,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990237613] [2024-11-20 14:59:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:01,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-20 14:59:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990237613] [2024-11-20 14:59:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990237613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276892989] [2024-11-20 14:59:02,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:59:02,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:02,021 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) [2024-11-20 14:59:02,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 14:59:02,136 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:59:02,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:59:02,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 14:59:02,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:02,165 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 [2024-11-20 14:59:02,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:59:02,212 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-20 14:59:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:02,279 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 14 treesize of output 9 [2024-11-20 14:59:02,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:59:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:02,367 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 14 treesize of output 9 [2024-11-20 14:59:02,385 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-20 14:59:02,408 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 14:59:02,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-20 14:59:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 12 not checked. [2024-11-20 14:59:02,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:02,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276892989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:02,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:59:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2024-11-20 14:59:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415399526] [2024-11-20 14:59:02,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:02,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 14:59:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 14:59:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=121, Unknown=2, NotChecked=46, Total=210 [2024-11-20 14:59:02,583 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-20 14:59:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:02,783 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-20 14:59:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-11-20 14:59:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:02,784 INFO L225 Difference]: With dead ends: 81 [2024-11-20 14:59:02,785 INFO L226 Difference]: Without dead ends: 81 [2024-11-20 14:59:02,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=186, Unknown=2, NotChecked=58, Total=306 [2024-11-20 14:59:02,785 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:02,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 173 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2024-11-20 14:59:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-20 14:59:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2024-11-20 14:59:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-11-20 14:59:02,795 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 41 [2024-11-20 14:59:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:02,795 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-11-20 14:59:02,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-20 14:59:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-11-20 14:59:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:59:02,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:02,799 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:02,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 14:59:02,999 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,SelfDestructingSolverStorable6 [2024-11-20 14:59:03,000 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:03,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1287953921, now seen corresponding path program 1 times [2024-11-20 14:59:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860593993] [2024-11-20 14:59:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:03,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:03,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:03,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:03,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 14:59:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860593993] [2024-11-20 14:59:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860593993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004401724] [2024-11-20 14:59:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:03,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:03,512 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) [2024-11-20 14:59:03,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 14:59:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:03,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 14:59:03,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:03,632 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 [2024-11-20 14:59:03,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:59:03,698 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-20 14:59:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:03,738 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 14 treesize of output 9 [2024-11-20 14:59:03,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:59:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:03,814 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 14 treesize of output 9 [2024-11-20 14:59:03,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:59:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:03,906 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 14 treesize of output 9 [2024-11-20 14:59:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-20 14:59:03,923 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:59:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004401724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:03,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:59:03,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2024-11-20 14:59:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439794161] [2024-11-20 14:59:03,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:03,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:59:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:59:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2024-11-20 14:59:03,924 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:03,990 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-11-20 14:59:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-20 14:59:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:03,991 INFO L225 Difference]: With dead ends: 67 [2024-11-20 14:59:03,991 INFO L226 Difference]: Without dead ends: 67 [2024-11-20 14:59:03,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2024-11-20 14:59:03,992 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:03,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 151 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2024-11-20 14:59:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-20 14:59:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-20 14:59:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.375) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-20 14:59:03,997 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 41 [2024-11-20 14:59:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:03,998 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-20 14:59:03,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-20 14:59:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 14:59:03,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:03,999 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:04,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 14:59:04,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:04,199 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:04,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1271865857, now seen corresponding path program 1 times [2024-11-20 14:59:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168558004] [2024-11-20 14:59:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 14:59:04,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:04,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168558004] [2024-11-20 14:59:04,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168558004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:04,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:04,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:59:04,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492360565] [2024-11-20 14:59:04,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:04,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:59:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:59:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:04,378 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:59:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:04,458 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-20 14:59:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-20 14:59:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:04,459 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:59:04,459 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:59:04,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:04,460 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:04,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 228 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:59:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-20 14:59:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-20 14:59:04,463 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 42 [2024-11-20 14:59:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:04,463 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-20 14:59:04,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:59:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-20 14:59:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 14:59:04,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:04,464 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:04,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 14:59:04,464 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:04,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1271865856, now seen corresponding path program 1 times [2024-11-20 14:59:04,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:04,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747621618] [2024-11-20 14:59:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 14:59:04,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747621618] [2024-11-20 14:59:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747621618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:04,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:59:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748180512] [2024-11-20 14:59:04,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:04,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:59:04,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:59:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:04,592 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:59:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:04,675 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-11-20 14:59:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-20 14:59:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:04,676 INFO L225 Difference]: With dead ends: 65 [2024-11-20 14:59:04,676 INFO L226 Difference]: Without dead ends: 65 [2024-11-20 14:59:04,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:59:04,676 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:04,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 220 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-20 14:59:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-20 14:59:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-11-20 14:59:04,679 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2024-11-20 14:59:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:04,679 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-11-20 14:59:04,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:59:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-11-20 14:59:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-20 14:59:04,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:04,680 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:04,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 14:59:04,681 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:04,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1418752221, now seen corresponding path program 1 times [2024-11-20 14:59:04,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:04,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853595259] [2024-11-20 14:59:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:04,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-20 14:59:04,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:04,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853595259] [2024-11-20 14:59:04,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853595259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:04,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:04,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-20 14:59:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393566012] [2024-11-20 14:59:04,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:04,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:59:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:59:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:59:04,859 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:04,911 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-20 14:59:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:59:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2024-11-20 14:59:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:04,912 INFO L225 Difference]: With dead ends: 63 [2024-11-20 14:59:04,912 INFO L226 Difference]: Without dead ends: 63 [2024-11-20 14:59:04,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:59:04,913 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:04,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 150 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:59:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-20 14:59:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-20 14:59:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-20 14:59:04,915 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2024-11-20 14:59:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:04,915 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-20 14:59:04,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-20 14:59:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-20 14:59:04,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:04,916 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:04,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 14:59:04,917 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:04,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 725726539, now seen corresponding path program 1 times [2024-11-20 14:59:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207850108] [2024-11-20 14:59:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-20 14:59:05,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207850108] [2024-11-20 14:59:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207850108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:05,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 14:59:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987347214] [2024-11-20 14:59:05,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:05,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:59:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:59:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:59:05,171 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:05,303 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-20 14:59:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:59:05,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2024-11-20 14:59:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:05,304 INFO L225 Difference]: With dead ends: 64 [2024-11-20 14:59:05,304 INFO L226 Difference]: Without dead ends: 64 [2024-11-20 14:59:05,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:59:05,305 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:05,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 233 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-20 14:59:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-20 14:59:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.3) internal successors, (65), 59 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2024-11-20 14:59:05,311 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 49 [2024-11-20 14:59:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:05,311 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2024-11-20 14:59:05,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2024-11-20 14:59:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-20 14:59:05,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:05,312 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:05,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 14:59:05,312 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:05,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 725726540, now seen corresponding path program 1 times [2024-11-20 14:59:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613753679] [2024-11-20 14:59:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 14:59:05,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:05,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613753679] [2024-11-20 14:59:05,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613753679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:05,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:05,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 14:59:05,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804571004] [2024-11-20 14:59:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:05,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:59:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:59:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:59:05,718 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:05,845 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-20 14:59:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:59:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2024-11-20 14:59:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:05,847 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:59:05,847 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:59:05,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:59:05,848 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:05,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 288 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:59:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-20 14:59:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-11-20 14:59:05,853 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 49 [2024-11-20 14:59:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:05,853 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-11-20 14:59:05,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-11-20 14:59:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-20 14:59:05,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:05,854 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:05,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 14:59:05,854 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:05,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -747315640, now seen corresponding path program 1 times [2024-11-20 14:59:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334120595] [2024-11-20 14:59:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 14:59:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334120595] [2024-11-20 14:59:06,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334120595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:06,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:06,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-20 14:59:06,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545783667] [2024-11-20 14:59:06,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:06,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:59:06,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:06,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:59:06,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:59:06,090 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:06,182 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-20 14:59:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:59:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2024-11-20 14:59:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:06,183 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:59:06,183 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:59:06,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:59:06,183 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:06,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 345 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:59:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-20 14:59:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.25) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-20 14:59:06,186 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2024-11-20 14:59:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:06,186 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-20 14:59:06,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-20 14:59:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-20 14:59:06,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:06,190 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:06,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 14:59:06,190 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:06,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 334462294, now seen corresponding path program 1 times [2024-11-20 14:59:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266913106] [2024-11-20 14:59:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:59:07,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266913106] [2024-11-20 14:59:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266913106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885517503] [2024-11-20 14:59:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:07,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:07,002 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) [2024-11-20 14:59:07,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 14:59:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:07,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-20 14:59:07,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:07,199 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 [2024-11-20 14:59:07,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-20 14:59:07,448 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 14:59:07,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-20 14:59:07,640 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 15 treesize of output 11 [2024-11-20 14:59:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:07,740 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:07,741 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-20 14:59:07,744 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 [2024-11-20 14:59:07,844 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:07,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-20 14:59:07,851 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:07,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:07,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-20 14:59:07,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:07,944 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 19 treesize of output 17 [2024-11-20 14:59:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:59:08,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:08,374 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 28 treesize of output 24 [2024-11-20 14:59:12,407 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|v_ULTIMATE.start_main_~ptr~0#1.offset_14| Int)) (or (= (select |c_#valid| (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ |v_ULTIMATE.start_main_~ptr~0#1.offset_14| 4))) 1) (< |v_ULTIMATE.start_main_~ptr~0#1.offset_14| 0))))) (and (or .cse0 (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) (forall ((|v_ULTIMATE.start_main_~ptr~0#1.offset_14| Int)) (or (< |v_ULTIMATE.start_main_~ptr~0#1.offset_14| 0) (= (select |c_#valid| (select (select |c_#memory_$Pointer$#1.base| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ |v_ULTIMATE.start_main_~ptr~0#1.offset_14| 4))) 1) (< |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| |v_ULTIMATE.start_main_~ptr~0#1.offset_14|))) (or (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) .cse0))) is different from false [2024-11-20 14:59:12,447 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 46 treesize of output 36 [2024-11-20 14:59:12,475 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 46 treesize of output 36 [2024-11-20 14:59:12,503 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 70 treesize of output 52 [2024-11-20 14:59:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885517503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:13,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:59:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2024-11-20 14:59:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777190578] [2024-11-20 14:59:13,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:13,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-20 14:59:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-20 14:59:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2300, Unknown=1, NotChecked=96, Total=2550 [2024-11-20 14:59:13,050 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-20 14:59:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:14,031 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-11-20 14:59:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 14:59:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-20 14:59:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:14,032 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:59:14,032 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:59:14,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=281, Invalid=3628, Unknown=1, NotChecked=122, Total=4032 [2024-11-20 14:59:14,034 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:14,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 698 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-20 14:59:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:59:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-11-20 14:59:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.290909090909091) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-20 14:59:14,038 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 54 [2024-11-20 14:59:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:14,039 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-20 14:59:14,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 35 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-20 14:59:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-20 14:59:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-20 14:59:14,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:14,040 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:14,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 14:59:14,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 14:59:14,245 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:14,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 334462295, now seen corresponding path program 1 times [2024-11-20 14:59:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:14,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280477380] [2024-11-20 14:59:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:15,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:15,038 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:15,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 14:59:15,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280477380] [2024-11-20 14:59:15,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280477380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444869136] [2024-11-20 14:59:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:15,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:15,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:15,241 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) [2024-11-20 14:59:15,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 14:59:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:15,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-20 14:59:15,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:15,429 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 [2024-11-20 14:59:15,433 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 [2024-11-20 14:59:15,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-20 14:59:15,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-20 14:59:15,919 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 14:59:15,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-20 14:59:15,948 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-20 14:59:15,948 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 15 treesize of output 15 [2024-11-20 14:59:16,183 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 17 treesize of output 13 [2024-11-20 14:59:16,193 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 17 treesize of output 13 [2024-11-20 14:59:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:16,311 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-11-20 14:59:16,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2024-11-20 14:59:16,317 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:16,317 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 31 [2024-11-20 14:59:16,405 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 66 treesize of output 46 [2024-11-20 14:59:16,411 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 50 treesize of output 34 [2024-11-20 14:59:16,513 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 31 treesize of output 13 [2024-11-20 14:59:16,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-20 14:59:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:59:16,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:16,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 76 [2024-11-20 14:59:16,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:16,897 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 158 treesize of output 128 [2024-11-20 14:59:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:16,902 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 190 treesize of output 130 [2024-11-20 14:59:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444869136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:17,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:59:17,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2024-11-20 14:59:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16595304] [2024-11-20 14:59:17,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:17,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-20 14:59:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-20 14:59:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2607, Unknown=0, NotChecked=0, Total=2756 [2024-11-20 14:59:17,320 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-20 14:59:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:18,813 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-11-20 14:59:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 14:59:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-20 14:59:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:18,814 INFO L225 Difference]: With dead ends: 82 [2024-11-20 14:59:18,814 INFO L226 Difference]: Without dead ends: 82 [2024-11-20 14:59:18,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=297, Invalid=4533, Unknown=0, NotChecked=0, Total=4830 [2024-11-20 14:59:18,815 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:18,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 959 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-20 14:59:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-20 14:59:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-11-20 14:59:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2024-11-20 14:59:18,817 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 54 [2024-11-20 14:59:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:18,818 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2024-11-20 14:59:18,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.125) internal successors, (85), 37 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-20 14:59:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2024-11-20 14:59:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-20 14:59:18,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:18,818 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2024-11-20 14:59:18,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 14:59:19,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 14:59:19,019 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:19,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1778385747, now seen corresponding path program 1 times [2024-11-20 14:59:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434896907] [2024-11-20 14:59:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:19,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:19,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:19,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 14:59:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434896907] [2024-11-20 14:59:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434896907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:59:19,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:59:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-20 14:59:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41430814] [2024-11-20 14:59:19,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:59:19,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 14:59:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 14:59:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:59:19,455 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:19,639 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2024-11-20 14:59:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:59:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2024-11-20 14:59:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:19,640 INFO L225 Difference]: With dead ends: 82 [2024-11-20 14:59:19,640 INFO L226 Difference]: Without dead ends: 82 [2024-11-20 14:59:19,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-11-20 14:59:19,640 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:19,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 416 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:59:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-20 14:59:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-11-20 14:59:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2024-11-20 14:59:19,642 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 55 [2024-11-20 14:59:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:19,642 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2024-11-20 14:59:19,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:59:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2024-11-20 14:59:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-20 14:59:19,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:19,646 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2024-11-20 14:59:19,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 14:59:19,646 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:19,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -359197091, now seen corresponding path program 1 times [2024-11-20 14:59:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:19,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307462164] [2024-11-20 14:59:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:19,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:20,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:20,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:20,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 14:59:20,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307462164] [2024-11-20 14:59:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307462164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682850797] [2024-11-20 14:59:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:20,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:20,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:59:20,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 14:59:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:20,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 14:59:20,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:20,652 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 17 treesize of output 13 [2024-11-20 14:59:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:20,708 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2024-11-20 14:59:20,714 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 15 treesize of output 1 [2024-11-20 14:59:20,769 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:20,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2024-11-20 14:59:20,773 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:59:20,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:20,775 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 22 treesize of output 17 [2024-11-20 14:59:20,816 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 20 treesize of output 8 [2024-11-20 14:59:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:59:20,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:20,867 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 66 treesize of output 62 [2024-11-20 14:59:20,923 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 34 [2024-11-20 14:59:21,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:21,007 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 21 treesize of output 21 [2024-11-20 14:59:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-20 14:59:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682850797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:59:21,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:59:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 44 [2024-11-20 14:59:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876742455] [2024-11-20 14:59:21,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:21,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-20 14:59:21,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:21,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-20 14:59:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2024-11-20 14:59:21,211 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-20 14:59:25,229 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] [2024-11-20 14:59:29,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:59:33,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:59:37,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:59:41,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:59:45,773 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] [2024-11-20 14:59:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:59:46,234 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2024-11-20 14:59:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-20 14:59:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2024-11-20 14:59:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:59:46,235 INFO L225 Difference]: With dead ends: 78 [2024-11-20 14:59:46,235 INFO L226 Difference]: Without dead ends: 78 [2024-11-20 14:59:46,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=3724, Unknown=0, NotChecked=0, Total=4032 [2024-11-20 14:59:46,236 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:59:46,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1177 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1056 Invalid, 6 Unknown, 0 Unchecked, 24.5s Time] [2024-11-20 14:59:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-20 14:59:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-20 14:59:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 14:59:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-11-20 14:59:46,242 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 57 [2024-11-20 14:59:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:59:46,242 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-11-20 14:59:46,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 39 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-20 14:59:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-11-20 14:59:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-20 14:59:46,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:59:46,243 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:59:46,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 14:59:46,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 14:59:46,448 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 14:59:46,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:59:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -345766869, now seen corresponding path program 2 times [2024-11-20 14:59:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:59:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216837135] [2024-11-20 14:59:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:59:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:59:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:47,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 14:59:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:47,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 14:59:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:47,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 14:59:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:59:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:59:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:59:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216837135] [2024-11-20 14:59:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216837135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001254137] [2024-11-20 14:59:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:59:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:59:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:59:48,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:59:48,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 14:59:48,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:59:48,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:59:48,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-20 14:59:48,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:59:48,454 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 [2024-11-20 14:59:48,683 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 14:59:48,683 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 19 treesize of output 16 [2024-11-20 14:59:48,765 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 [2024-11-20 14:59:49,019 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 14 [2024-11-20 14:59:49,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 14:59:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:59:49,287 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 42 treesize of output 31 [2024-11-20 14:59:49,308 INFO L349 Elim1Store]: treesize reduction 82, result has 36.4 percent of original size [2024-11-20 14:59:49,308 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 38 treesize of output 56 [2024-11-20 14:59:49,686 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 15 treesize of output 1 [2024-11-20 14:59:49,693 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 63 treesize of output 42 [2024-11-20 14:59:49,854 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 103 treesize of output 60 [2024-11-20 14:59:49,880 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-20 14:59:49,880 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 2 case distinctions, treesize of input 41 treesize of output 44 [2024-11-20 14:59:50,047 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 124 treesize of output 80 [2024-11-20 14:59:50,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:50,248 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 17 treesize of output 15 [2024-11-20 14:59:50,841 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2024-11-20 14:59:50,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 37 [2024-11-20 14:59:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:59:51,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:59:52,049 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 66 treesize of output 48 [2024-11-20 14:59:56,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:59:56,883 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 209 [2024-11-20 14:59:57,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001254137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:59:57,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:59:57,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 66 [2024-11-20 14:59:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500853757] [2024-11-20 14:59:57,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:59:57,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-20 14:59:57,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:59:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-20 14:59:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=5740, Unknown=1, NotChecked=0, Total=6006 [2024-11-20 14:59:57,401 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 67 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-20 15:00:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:00,756 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2024-11-20 15:00:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-20 15:00:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2024-11-20 15:00:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:00,757 INFO L225 Difference]: With dead ends: 88 [2024-11-20 15:00:00,757 INFO L226 Difference]: Without dead ends: 88 [2024-11-20 15:00:00,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=586, Invalid=10969, Unknown=1, NotChecked=0, Total=11556 [2024-11-20 15:00:00,759 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:00,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1094 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-20 15:00:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-20 15:00:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2024-11-20 15:00:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 15:00:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-20 15:00:00,761 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 59 [2024-11-20 15:00:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:00,761 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-20 15:00:00,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-20 15:00:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-20 15:00:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-20 15:00:00,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:00,762 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:00,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 15:00:00,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:00,963 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 15:00:00,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash -345766868, now seen corresponding path program 2 times [2024-11-20 15:00:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33501243] [2024-11-20 15:00:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:00,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:02,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 15:00:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:02,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 15:00:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:02,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 15:00:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33501243] [2024-11-20 15:00:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33501243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355051406] [2024-11-20 15:00:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:00:03,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:03,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:03,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 15:00:03,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:00:03,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:00:03,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-11-20 15:00:03,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:03,429 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 [2024-11-20 15:00:03,800 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 15:00:03,800 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 19 treesize of output 16 [2024-11-20 15:00:03,809 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 14 treesize of output 9 [2024-11-20 15:00:03,907 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 [2024-11-20 15:00:03,913 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 15 treesize of output 1 [2024-11-20 15:00:04,187 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 43 treesize of output 19 [2024-11-20 15:00:04,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 15:00:04,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 15:00:04,198 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 11 treesize of output 3 [2024-11-20 15:00:04,530 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 15:00:04,530 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 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-20 15:00:04,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:00:04,539 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 51 treesize of output 34 [2024-11-20 15:00:04,550 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-20 15:00:04,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-20 15:00:04,560 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 22 treesize of output 17 [2024-11-20 15:00:04,912 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 57 treesize of output 40 [2024-11-20 15:00:04,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:05,068 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 87 treesize of output 48 [2024-11-20 15:00:05,092 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-20 15:00:05,093 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 2 case distinctions, treesize of input 41 treesize of output 44 [2024-11-20 15:00:05,208 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 95 treesize of output 63 [2024-11-20 15:00:05,818 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2024-11-20 15:00:05,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 48 [2024-11-20 15:00:05,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:05,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2024-11-20 15:00:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:06,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:16,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:16,950 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 235 [2024-11-20 15:00:16,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:16,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 234 [2024-11-20 15:00:17,129 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 9 treesize of output 1 [2024-11-20 15:00:17,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355051406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:17,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 15:00:17,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 70 [2024-11-20 15:00:17,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239651218] [2024-11-20 15:00:17,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:17,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-20 15:00:17,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-20 15:00:17,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7230, Unknown=1, NotChecked=0, Total=7482 [2024-11-20 15:00:17,663 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-20 15:00:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:25,584 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2024-11-20 15:00:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-20 15:00:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2024-11-20 15:00:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:25,585 INFO L225 Difference]: With dead ends: 90 [2024-11-20 15:00:25,585 INFO L226 Difference]: Without dead ends: 90 [2024-11-20 15:00:25,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=599, Invalid=13920, Unknown=1, NotChecked=0, Total=14520 [2024-11-20 15:00:25,588 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 138 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:25,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1594 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3023 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-20 15:00:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-20 15:00:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-11-20 15:00:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 77 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-20 15:00:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2024-11-20 15:00:25,593 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 59 [2024-11-20 15:00:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:25,593 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2024-11-20 15:00:25,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-20 15:00:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2024-11-20 15:00:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-20 15:00:25,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:25,594 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:25,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:25,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:25,794 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-20 15:00:25,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2128849122, now seen corresponding path program 1 times [2024-11-20 15:00:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:25,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609053357] [2024-11-20 15:00:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:25,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-20 15:00:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-20 15:00:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:27,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-20 15:00:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609053357] [2024-11-20 15:00:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609053357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771086857] [2024-11-20 15:00:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:27,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 15:00:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:27,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-20 15:00:27,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:27,630 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 [2024-11-20 15:00:27,848 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-20 15:00:27,848 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 1 case distinctions, treesize of input 27 treesize of output 17 [2024-11-20 15:00:28,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-20 15:00:28,847 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 15:00:28,847 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 1 case distinctions, treesize of input 38 treesize of output 41 [2024-11-20 15:00:29,563 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 15:00:29,564 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 1 case distinctions, treesize of input 53 treesize of output 56 [2024-11-20 15:00:29,623 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 17 treesize of output 13 [2024-11-20 15:00:29,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-20 15:00:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:29,919 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:29,920 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 58 [2024-11-20 15:00:29,929 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:30,018 INFO L349 Elim1Store]: treesize reduction 52, result has 51.4 percent of original size [2024-11-20 15:00:30,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 130 treesize of output 145