./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:31:17,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:31:17,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:31:17,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:31:17,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:31:17,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:31:17,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:31:17,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:31:17,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:31:17,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:31:17,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:31:17,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:31:17,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:31:17,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:31:17,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:31:17,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:31:17,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:31:17,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:31:17,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:31:17,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:31:17,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:31:17,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:31:17,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:31:17,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:31:17,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:31:17,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:31:17,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:31:17,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:31:17,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:31:17,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:31:17,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:31:17,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:31:17,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:31:17,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:31:17,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:31:17,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:31:17,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:31:17,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:31:17,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:31:17,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:31:17,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:31:17,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:31:17,468 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:31:17,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:31:17,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:31:17,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:31:17,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:31:17,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:31:17,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:31:17,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:31:17,470 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:31:17,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:31:17,471 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:31:17,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:31:17,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:31:17,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:31:17,473 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:31:17,473 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:31:17,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:31:17,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:31:17,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:31:17,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:31:17,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:31:17,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:31:17,475 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:31:17,475 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2023-02-16 03:31:17,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:31:17,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:31:17,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:31:17,694 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:31:17,694 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:31:17,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-16 03:31:18,667 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:31:18,885 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:31:18,887 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-16 03:31:18,899 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a4cf9d4/51783a1eff914693ab81d57181f71d81/FLAG2fd138b08 [2023-02-16 03:31:18,908 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a4cf9d4/51783a1eff914693ab81d57181f71d81 [2023-02-16 03:31:18,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:31:18,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:31:18,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:31:18,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:31:18,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:31:18,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3e31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:18, skipping insertion in model container [2023-02-16 03:31:18,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:31:18" (1/1) ... [2023-02-16 03:31:18,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:31:18,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:31:19,116 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-16 03:31:19,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:31:19,160 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:31:19,192 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-16 03:31:19,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:31:19,222 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:31:19,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19 WrapperNode [2023-02-16 03:31:19,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:31:19,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:31:19,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:31:19,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:31:19,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,254 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2023-02-16 03:31:19,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:31:19,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:31:19,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:31:19,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:31:19,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:31:19,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:31:19,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:31:19,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:31:19,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (1/1) ... [2023-02-16 03:31:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:31:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:19,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 03:31:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 03:31:19,358 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-16 03:31:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-16 03:31:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:31:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-02-16 03:31:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:31:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 03:31:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-02-16 03:31:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-02-16 03:31:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:31:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-02-16 03:31:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-02-16 03:31:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:31:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:31:19,459 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:31:19,460 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:31:19,914 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:31:19,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:31:19,920 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-16 03:31:19,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:31:19 BoogieIcfgContainer [2023-02-16 03:31:19,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:31:19,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:31:19,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:31:19,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:31:19,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:31:18" (1/3) ... [2023-02-16 03:31:19,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e8477c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:31:19, skipping insertion in model container [2023-02-16 03:31:19,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:31:19" (2/3) ... [2023-02-16 03:31:19,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e8477c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:31:19, skipping insertion in model container [2023-02-16 03:31:19,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:31:19" (3/3) ... [2023-02-16 03:31:19,927 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-02-16 03:31:19,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:31:19,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2023-02-16 03:31:19,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:31:19,988 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3b983b3d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:31:19,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2023-02-16 03:31:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 121 states have (on average 2.090909090909091) internal successors, (253), 209 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-16 03:31:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:31:19,996 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:19,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:31:19,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash 6220774, now seen corresponding path program 1 times [2023-02-16 03:31:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730944090] [2023-02-16 03:31:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730944090] [2023-02-16 03:31:20,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730944090] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:20,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64708914] [2023-02-16 03:31:20,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 03:31:20,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 03:31:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 03:31:20,205 INFO L87 Difference]: Start difference. First operand has 223 states, 121 states have (on average 2.090909090909091) internal successors, (253), 209 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,235 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2023-02-16 03:31:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 03:31:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-16 03:31:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,243 INFO L225 Difference]: With dead ends: 221 [2023-02-16 03:31:20,243 INFO L226 Difference]: Without dead ends: 219 [2023-02-16 03:31:20,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 03:31:20,247 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:31:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-16 03:31:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-02-16 03:31:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 116 states have (on average 1.8448275862068966) internal successors, (214), 205 states have internal predecessors, (214), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 240 transitions. [2023-02-16 03:31:20,282 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 240 transitions. Word has length 4 [2023-02-16 03:31:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,282 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 240 transitions. [2023-02-16 03:31:20,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 240 transitions. [2023-02-16 03:31:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:31:20,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:31:20,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1692154958, now seen corresponding path program 1 times [2023-02-16 03:31:20,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235668650] [2023-02-16 03:31:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235668650] [2023-02-16 03:31:20,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235668650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:20,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812827548] [2023-02-16 03:31:20,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:20,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:20,402 INFO L87 Difference]: Start difference. First operand 219 states and 240 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-16 03:31:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,550 INFO L93 Difference]: Finished difference Result 217 states and 238 transitions. [2023-02-16 03:31:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-16 03:31:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,552 INFO L225 Difference]: With dead ends: 217 [2023-02-16 03:31:20,552 INFO L226 Difference]: Without dead ends: 217 [2023-02-16 03:31:20,553 INFO L412 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 [2023-02-16 03:31:20,554 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 367 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-16 03:31:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-02-16 03:31:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 116 states have (on average 1.8275862068965518) internal successors, (212), 203 states have internal predecessors, (212), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 238 transitions. [2023-02-16 03:31:20,565 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 238 transitions. Word has length 6 [2023-02-16 03:31:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,565 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 238 transitions. [2023-02-16 03:31:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-16 03:31:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 238 transitions. [2023-02-16 03:31:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:31:20,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:31:20,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1692154959, now seen corresponding path program 1 times [2023-02-16 03:31:20,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094955172] [2023-02-16 03:31:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094955172] [2023-02-16 03:31:20,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094955172] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:31:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555627669] [2023-02-16 03:31:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:31:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:31:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:31:20,685 INFO L87 Difference]: Start difference. First operand 217 states and 238 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-16 03:31:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:20,794 INFO L93 Difference]: Finished difference Result 215 states and 236 transitions. [2023-02-16 03:31:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:31:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-16 03:31:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:20,799 INFO L225 Difference]: With dead ends: 215 [2023-02-16 03:31:20,799 INFO L226 Difference]: Without dead ends: 215 [2023-02-16 03:31:20,802 INFO L412 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 [2023-02-16 03:31:20,805 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 15 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:20,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 372 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-16 03:31:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-02-16 03:31:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 116 states have (on average 1.8103448275862069) internal successors, (210), 201 states have internal predecessors, (210), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 236 transitions. [2023-02-16 03:31:20,823 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 236 transitions. Word has length 6 [2023-02-16 03:31:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:20,823 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 236 transitions. [2023-02-16 03:31:20,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-16 03:31:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 236 transitions. [2023-02-16 03:31:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:31:20,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:20,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:31:20,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash -387700622, now seen corresponding path program 1 times [2023-02-16 03:31:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300998986] [2023-02-16 03:31:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300998986] [2023-02-16 03:31:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300998986] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:20,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:20,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:31:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372097237] [2023-02-16 03:31:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:31:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:31:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:20,982 INFO L87 Difference]: Start difference. First operand 215 states and 236 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,154 INFO L93 Difference]: Finished difference Result 210 states and 231 transitions. [2023-02-16 03:31:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:31:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,155 INFO L225 Difference]: With dead ends: 210 [2023-02-16 03:31:21,156 INFO L226 Difference]: Without dead ends: 210 [2023-02-16 03:31:21,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:21,157 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 56 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 606 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-16 03:31:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-02-16 03:31:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 116 states have (on average 1.7672413793103448) internal successors, (205), 196 states have internal predecessors, (205), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 231 transitions. [2023-02-16 03:31:21,165 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 231 transitions. Word has length 10 [2023-02-16 03:31:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,165 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 231 transitions. [2023-02-16 03:31:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 231 transitions. [2023-02-16 03:31:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:31:21,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:31:21,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -387700621, now seen corresponding path program 1 times [2023-02-16 03:31:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237817294] [2023-02-16 03:31:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237817294] [2023-02-16 03:31:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237817294] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:21,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:21,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:31:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316927258] [2023-02-16 03:31:21,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:21,300 INFO L87 Difference]: Start difference. First operand 210 states and 231 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,511 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2023-02-16 03:31:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:31:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,515 INFO L225 Difference]: With dead ends: 205 [2023-02-16 03:31:21,515 INFO L226 Difference]: Without dead ends: 205 [2023-02-16 03:31:21,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:31:21,518 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 39 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 544 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-16 03:31:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-02-16 03:31:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 116 states have (on average 1.7241379310344827) internal successors, (200), 191 states have internal predecessors, (200), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2023-02-16 03:31:21,534 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 10 [2023-02-16 03:31:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,535 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2023-02-16 03:31:21,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2023-02-16 03:31:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:31:21,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:31:21,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 866182740, now seen corresponding path program 1 times [2023-02-16 03:31:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773101416] [2023-02-16 03:31:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:21,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:21,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773101416] [2023-02-16 03:31:21,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773101416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:21,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:21,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:31:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16153328] [2023-02-16 03:31:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:21,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:21,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:21,579 INFO L87 Difference]: Start difference. First operand 205 states and 226 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,699 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2023-02-16 03:31:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 03:31:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,701 INFO L225 Difference]: With dead ends: 204 [2023-02-16 03:31:21,701 INFO L226 Difference]: Without dead ends: 204 [2023-02-16 03:31:21,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:21,702 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 21 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 630 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-16 03:31:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-02-16 03:31:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 116 states have (on average 1.7155172413793103) internal successors, (199), 190 states have internal predecessors, (199), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2023-02-16 03:31:21,707 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 11 [2023-02-16 03:31:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,707 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2023-02-16 03:31:21,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2023-02-16 03:31:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:31:21,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:31:21,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash 866182741, now seen corresponding path program 1 times [2023-02-16 03:31:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43478557] [2023-02-16 03:31:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43478557] [2023-02-16 03:31:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43478557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:21,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:21,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:31:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274278616] [2023-02-16 03:31:21,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:31:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:31:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:31:21,782 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:21,932 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2023-02-16 03:31:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 03:31:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:21,933 INFO L225 Difference]: With dead ends: 203 [2023-02-16 03:31:21,933 INFO L226 Difference]: Without dead ends: 203 [2023-02-16 03:31:21,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:21,934 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 17 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:21,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 645 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:31:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-16 03:31:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-02-16 03:31:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 116 states have (on average 1.706896551724138) internal successors, (198), 189 states have internal predecessors, (198), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2023-02-16 03:31:21,939 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 11 [2023-02-16 03:31:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:21,939 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2023-02-16 03:31:21,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:31:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2023-02-16 03:31:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 03:31:21,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:21,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:31:21,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash -610249734, now seen corresponding path program 1 times [2023-02-16 03:31:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:21,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668877058] [2023-02-16 03:31:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:21,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:22,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668877058] [2023-02-16 03:31:22,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668877058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:22,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:22,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:31:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196354716] [2023-02-16 03:31:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:22,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:31:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:31:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:22,259 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2023-02-16 03:31:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:22,682 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2023-02-16 03:31:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 19 [2023-02-16 03:31:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:22,684 INFO L225 Difference]: With dead ends: 202 [2023-02-16 03:31:22,687 INFO L226 Difference]: Without dead ends: 202 [2023-02-16 03:31:22,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:31:22,688 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 76 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:22,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 526 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:31:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-16 03:31:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-02-16 03:31:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 116 states have (on average 1.6982758620689655) internal successors, (197), 188 states have internal predecessors, (197), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2023-02-16 03:31:22,694 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 19 [2023-02-16 03:31:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:22,695 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2023-02-16 03:31:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2023-02-16 03:31:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2023-02-16 03:31:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 03:31:22,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:22,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:22,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:31:22,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -610249733, now seen corresponding path program 1 times [2023-02-16 03:31:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370703598] [2023-02-16 03:31:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370703598] [2023-02-16 03:31:22,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370703598] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:22,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:22,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:31:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145329815] [2023-02-16 03:31:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:22,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:31:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:31:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:22,893 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-16 03:31:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:23,125 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2023-02-16 03:31:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 19 [2023-02-16 03:31:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:23,127 INFO L225 Difference]: With dead ends: 201 [2023-02-16 03:31:23,127 INFO L226 Difference]: Without dead ends: 201 [2023-02-16 03:31:23,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:23,128 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 376 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:23,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 186 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:31:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-16 03:31:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-16 03:31:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 187 states have internal predecessors, (196), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2023-02-16 03:31:23,134 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 19 [2023-02-16 03:31:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:23,134 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2023-02-16 03:31:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-16 03:31:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2023-02-16 03:31:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:31:23,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:23,135 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-16 03:31:23,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 03:31:23,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 50383991, now seen corresponding path program 1 times [2023-02-16 03:31:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:23,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151682696] [2023-02-16 03:31:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:31:23,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:23,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151682696] [2023-02-16 03:31:23,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151682696] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:23,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229347774] [2023-02-16 03:31:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:23,582 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) [2023-02-16 03:31:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:31:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:31:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:23,809 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-16 03:31:23,810 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 31 [2023-02-16 03:31:23,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:31:23,876 INFO L350 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 25 treesize of output 29 [2023-02-16 03:31:23,905 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_438 Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_438))))) is different from true [2023-02-16 03:31:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:23,970 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-16 03:31:23,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-02-16 03:31:24,028 INFO L350 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 7 [2023-02-16 03:31:24,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_439 Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_439))))) is different from true [2023-02-16 03:31:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:24,081 INFO L350 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 16 treesize of output 18 [2023-02-16 03:31:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2023-02-16 03:31:24,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229347774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:24,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:24,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-16 03:31:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446730250] [2023-02-16 03:31:24,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:31:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:31:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=220, Unknown=2, NotChecked=62, Total=342 [2023-02-16 03:31:24,184 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:31:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:24,742 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2023-02-16 03:31:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:24,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-02-16 03:31:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:24,744 INFO L225 Difference]: With dead ends: 200 [2023-02-16 03:31:24,744 INFO L226 Difference]: Without dead ends: 200 [2023-02-16 03:31:24,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=304, Unknown=2, NotChecked=74, Total=462 [2023-02-16 03:31:24,744 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 208 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:24,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 622 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 846 Invalid, 0 Unknown, 420 Unchecked, 0.5s Time] [2023-02-16 03:31:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-16 03:31:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-02-16 03:31:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 116 states have (on average 1.6810344827586208) internal successors, (195), 186 states have internal predecessors, (195), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2023-02-16 03:31:24,748 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 37 [2023-02-16 03:31:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:24,749 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2023-02-16 03:31:24,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 03:31:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2023-02-16 03:31:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:31:24,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:24,750 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-16 03:31:24,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 03:31:24,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 50383992, now seen corresponding path program 1 times [2023-02-16 03:31:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11972873] [2023-02-16 03:31:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 03:31:25,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11972873] [2023-02-16 03:31:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11972873] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:25,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:25,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:31:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241526639] [2023-02-16 03:31:25,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:31:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:31:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:25,298 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:31:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:25,605 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2023-02-16 03:31:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:31:25,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-16 03:31:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:25,606 INFO L225 Difference]: With dead ends: 199 [2023-02-16 03:31:25,606 INFO L226 Difference]: Without dead ends: 199 [2023-02-16 03:31:25,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:31:25,606 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 189 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:25,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 238 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:31:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-16 03:31:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-02-16 03:31:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 185 states have internal predecessors, (194), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 220 transitions. [2023-02-16 03:31:25,610 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 220 transitions. Word has length 37 [2023-02-16 03:31:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:25,610 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 220 transitions. [2023-02-16 03:31:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:31:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 220 transitions. [2023-02-16 03:31:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:31:25,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:25,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-02-16 03:31:25,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:31:25,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash 819452048, now seen corresponding path program 1 times [2023-02-16 03:31:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:25,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214040138] [2023-02-16 03:31:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:31:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214040138] [2023-02-16 03:31:25,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214040138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:25,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:25,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:31:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490277781] [2023-02-16 03:31:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:31:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:31:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:25,977 INFO L87 Difference]: Start difference. First operand 199 states and 220 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:26,258 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2023-02-16 03:31:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2023-02-16 03:31:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:26,259 INFO L225 Difference]: With dead ends: 204 [2023-02-16 03:31:26,259 INFO L226 Difference]: Without dead ends: 204 [2023-02-16 03:31:26,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:26,260 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 238 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:26,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 306 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:31:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-16 03:31:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2023-02-16 03:31:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 178 states have internal predecessors, (187), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 03:31:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2023-02-16 03:31:26,263 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 58 [2023-02-16 03:31:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:26,263 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2023-02-16 03:31:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2023-02-16 03:31:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:31:26,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:26,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-02-16 03:31:26,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-16 03:31:26,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 819452049, now seen corresponding path program 1 times [2023-02-16 03:31:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135291092] [2023-02-16 03:31:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:26,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:26,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:31:26,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135291092] [2023-02-16 03:31:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135291092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:26,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:26,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:31:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242708582] [2023-02-16 03:31:26,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:26,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:31:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:31:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:31:26,564 INFO L87 Difference]: Start difference. First operand 192 states and 213 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:26,925 INFO L93 Difference]: Finished difference Result 215 states and 244 transitions. [2023-02-16 03:31:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:31:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2023-02-16 03:31:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:26,927 INFO L225 Difference]: With dead ends: 215 [2023-02-16 03:31:26,927 INFO L226 Difference]: Without dead ends: 215 [2023-02-16 03:31:26,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:31:26,928 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 415 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:26,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 290 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:31:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-16 03:31:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2023-02-16 03:31:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 123 states have (on average 1.5365853658536586) internal successors, (189), 179 states have internal predecessors, (189), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 217 transitions. [2023-02-16 03:31:26,933 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 217 transitions. Word has length 58 [2023-02-16 03:31:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:26,934 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 217 transitions. [2023-02-16 03:31:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 217 transitions. [2023-02-16 03:31:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:31:26,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:26,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:26,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-16 03:31:26,935 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash -366790067, now seen corresponding path program 1 times [2023-02-16 03:31:26,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:26,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920716768] [2023-02-16 03:31:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:26,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:31:27,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920716768] [2023-02-16 03:31:27,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920716768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:27,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:27,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:31:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499134493] [2023-02-16 03:31:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:31:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:31:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:27,305 INFO L87 Difference]: Start difference. First operand 194 states and 217 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:27,649 INFO L93 Difference]: Finished difference Result 199 states and 223 transitions. [2023-02-16 03:31:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:27,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-02-16 03:31:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:27,650 INFO L225 Difference]: With dead ends: 199 [2023-02-16 03:31:27,651 INFO L226 Difference]: Without dead ends: 199 [2023-02-16 03:31:27,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:31:27,651 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 173 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:27,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 385 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:31:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-16 03:31:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2023-02-16 03:31:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 172 states have internal predecessors, (182), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2023-02-16 03:31:27,655 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 59 [2023-02-16 03:31:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:27,655 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2023-02-16 03:31:27,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:31:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2023-02-16 03:31:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:31:27,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:27,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-16 03:31:27,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash -366790066, now seen corresponding path program 1 times [2023-02-16 03:31:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619131258] [2023-02-16 03:31:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:31:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619131258] [2023-02-16 03:31:28,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619131258] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:31:28,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:31:28,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:31:28,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396573793] [2023-02-16 03:31:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:31:28,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:31:28,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:31:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:31:28,061 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:31:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:28,394 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2023-02-16 03:31:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:31:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 59 [2023-02-16 03:31:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:28,395 INFO L225 Difference]: With dead ends: 194 [2023-02-16 03:31:28,395 INFO L226 Difference]: Without dead ends: 194 [2023-02-16 03:31:28,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:31:28,396 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 350 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:28,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 153 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:31:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-16 03:31:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 180. [2023-02-16 03:31:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.4227642276422765) internal successors, (175), 165 states have internal predecessors, (175), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 203 transitions. [2023-02-16 03:31:28,400 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 203 transitions. Word has length 59 [2023-02-16 03:31:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:28,400 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 203 transitions. [2023-02-16 03:31:28,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:31:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 203 transitions. [2023-02-16 03:31:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-16 03:31:28,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:28,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:28,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-16 03:31:28,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1983741876, now seen corresponding path program 1 times [2023-02-16 03:31:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051719624] [2023-02-16 03:31:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:28,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:28,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:31:29,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051719624] [2023-02-16 03:31:29,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051719624] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107708927] [2023-02-16 03:31:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:29,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:29,429 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) [2023-02-16 03:31:29,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:31:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:29,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-16 03:31:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:29,734 INFO L350 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 11 treesize of output 7 [2023-02-16 03:31:29,835 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:31:29,835 INFO L350 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 24 treesize of output 19 [2023-02-16 03:31:29,877 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:31:29,877 INFO L350 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 20 treesize of output 8 [2023-02-16 03:31:30,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1559 (Array Int Int)) (v_ArrVal_1558 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1558) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1559)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:31:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:30,155 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:31:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2023-02-16 03:31:30,165 INFO L350 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 14 treesize of output 10 [2023-02-16 03:31:30,211 INFO L350 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 [2023-02-16 03:31:30,264 INFO L350 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 20 [2023-02-16 03:31:30,269 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:31:30,270 INFO L350 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 22 treesize of output 20 [2023-02-16 03:31:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-16 03:31:30,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:30,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:31:30,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107708927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:30,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:30,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 34 [2023-02-16 03:31:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600798790] [2023-02-16 03:31:30,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:31:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:31:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1066, Unknown=25, NotChecked=66, Total=1260 [2023-02-16 03:31:30,427 INFO L87 Difference]: Start difference. First operand 180 states and 203 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 31 states have internal predecessors, (87), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:31:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:32,561 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2023-02-16 03:31:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 03:31:32,562 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 31 states have internal predecessors, (87), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 64 [2023-02-16 03:31:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:32,563 INFO L225 Difference]: With dead ends: 283 [2023-02-16 03:31:32,563 INFO L226 Difference]: Without dead ends: 283 [2023-02-16 03:31:32,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=271, Invalid=2354, Unknown=31, NotChecked=100, Total=2756 [2023-02-16 03:31:32,564 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 655 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 2935 mSolverCounterSat, 75 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 3317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2935 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 2115 Invalid, 3317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2935 Invalid, 10 Unknown, 297 Unchecked, 1.4s Time] [2023-02-16 03:31:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-02-16 03:31:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 194. [2023-02-16 03:31:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.4338235294117647) internal successors, (195), 178 states have internal predecessors, (195), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2023-02-16 03:31:32,571 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 64 [2023-02-16 03:31:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:32,571 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2023-02-16 03:31:32,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 31 states have internal predecessors, (87), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:31:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2023-02-16 03:31:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:31:32,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:32,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:32,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:32,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 03:31:32,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash 578612374, now seen corresponding path program 1 times [2023-02-16 03:31:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:32,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013601319] [2023-02-16 03:31:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:33,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:33,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:31:34,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013601319] [2023-02-16 03:31:34,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013601319] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210936173] [2023-02-16 03:31:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:34,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:34,405 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) [2023-02-16 03:31:34,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:31:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-16 03:31:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:34,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:31:34,695 INFO L350 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 11 treesize of output 7 [2023-02-16 03:31:34,813 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:31:34,814 INFO L350 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 1 case distinctions, treesize of input 24 treesize of output 19 [2023-02-16 03:31:34,866 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:31:34,866 INFO L350 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 20 treesize of output 8 [2023-02-16 03:31:34,869 INFO L350 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 [2023-02-16 03:31:35,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1857 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1858 (Array Int Int))) (and (= 0 (select |c_old(#valid)| |chain_node_~node~0#1.base|)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1857) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1858)))) is different from true [2023-02-16 03:31:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:35,145 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:31:35,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2023-02-16 03:31:35,149 INFO L350 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 14 treesize of output 10 [2023-02-16 03:31:35,161 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:31:35,170 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:31:35,171 INFO L350 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-16 03:31:35,232 INFO L350 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 19 treesize of output 21 [2023-02-16 03:31:35,291 INFO L350 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 12 treesize of output 8 [2023-02-16 03:31:35,533 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1863 (Array Int Int)) (v_ArrVal_1862 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1862) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1863)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:31:35,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:35,555 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-02-16 03:31:35,555 INFO L350 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 2 case distinctions, treesize of input 22 treesize of output 34 [2023-02-16 03:31:35,605 INFO L350 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 [2023-02-16 03:31:35,672 INFO L350 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 20 [2023-02-16 03:31:35,677 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:31:35,677 INFO L350 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 22 treesize of output 20 [2023-02-16 03:31:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:31:35,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:35,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:31:35,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210936173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:35,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:35,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 44 [2023-02-16 03:31:35,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903436167] [2023-02-16 03:31:35,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:35,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-16 03:31:35,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-16 03:31:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1717, Unknown=22, NotChecked=170, Total=2070 [2023-02-16 03:31:35,876 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand has 44 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:38,539 INFO L93 Difference]: Finished difference Result 282 states and 318 transitions. [2023-02-16 03:31:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 03:31:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2023-02-16 03:31:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:38,548 INFO L225 Difference]: With dead ends: 282 [2023-02-16 03:31:38,549 INFO L226 Difference]: Without dead ends: 282 [2023-02-16 03:31:38,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=406, Invalid=3482, Unknown=26, NotChecked=246, Total=4160 [2023-02-16 03:31:38,550 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 713 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 90 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:38,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 1796 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3409 Invalid, 8 Unknown, 588 Unchecked, 1.8s Time] [2023-02-16 03:31:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-16 03:31:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 194. [2023-02-16 03:31:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.4264705882352942) internal successors, (194), 178 states have internal predecessors, (194), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2023-02-16 03:31:38,555 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 66 [2023-02-16 03:31:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2023-02-16 03:31:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2023-02-16 03:31:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:31:38,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:38,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:38,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:38,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:38,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash 578601438, now seen corresponding path program 1 times [2023-02-16 03:31:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:38,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991819268] [2023-02-16 03:31:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:39,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:39,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:31:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991819268] [2023-02-16 03:31:40,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991819268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182204649] [2023-02-16 03:31:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:40,127 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) [2023-02-16 03:31:40,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:31:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-16 03:31:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:40,583 INFO L350 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 [2023-02-16 03:31:40,602 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 03:31:40,602 INFO L350 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 [2023-02-16 03:31:40,725 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:31:40,726 INFO L350 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 33 treesize of output 24 [2023-02-16 03:31:40,773 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:31:40,773 INFO L350 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 29 treesize of output 13 [2023-02-16 03:31:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:41,246 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:31:41,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 52 [2023-02-16 03:31:41,256 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-16 03:31:41,257 INFO L350 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 1 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:31:41,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:31:41,270 INFO L350 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 14 treesize of output 10 [2023-02-16 03:31:41,380 INFO L321 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-02-16 03:31:41,381 INFO L350 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 3 case distinctions, treesize of input 34 treesize of output 51 [2023-02-16 03:31:41,535 INFO L350 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 63 treesize of output 55 [2023-02-16 03:31:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:31:47,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:48,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182204649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:48,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:48,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2023-02-16 03:31:48,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465089748] [2023-02-16 03:31:48,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:48,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-16 03:31:48,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-16 03:31:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2278, Unknown=7, NotChecked=0, Total=2450 [2023-02-16 03:31:48,034 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 47 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:31:53,145 INFO L93 Difference]: Finished difference Result 266 states and 301 transitions. [2023-02-16 03:31:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:31:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2023-02-16 03:31:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:31:53,147 INFO L225 Difference]: With dead ends: 266 [2023-02-16 03:31:53,147 INFO L226 Difference]: Without dead ends: 266 [2023-02-16 03:31:53,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=376, Invalid=4027, Unknown=19, NotChecked=0, Total=4422 [2023-02-16 03:31:53,148 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 516 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 4395 mSolverCounterSat, 90 mSolverCounterUnsat, 142 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4395 IncrementalHoareTripleChecker+Invalid, 142 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:31:53,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2503 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4395 Invalid, 142 Unknown, 0 Unchecked, 2.5s Time] [2023-02-16 03:31:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-16 03:31:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 194. [2023-02-16 03:31:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.4191176470588236) internal successors, (193), 178 states have internal predecessors, (193), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:31:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 221 transitions. [2023-02-16 03:31:53,153 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 221 transitions. Word has length 66 [2023-02-16 03:31:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:31:53,153 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 221 transitions. [2023-02-16 03:31:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:31:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 221 transitions. [2023-02-16 03:31:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:31:53,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:31:53,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:31:53,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:31:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:31:53,360 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:31:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:31:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash 578601439, now seen corresponding path program 1 times [2023-02-16 03:31:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:31:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282242224] [2023-02-16 03:31:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:31:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:31:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:31:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:31:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:31:56,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:31:56,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282242224] [2023-02-16 03:31:56,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282242224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:56,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223713998] [2023-02-16 03:31:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:31:56,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:31:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:31:56,322 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) [2023-02-16 03:31:56,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:31:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:31:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-16 03:31:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:31:56,608 INFO L350 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 [2023-02-16 03:31:56,659 INFO L350 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 [2023-02-16 03:31:56,663 INFO L350 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 [2023-02-16 03:31:56,827 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:31:56,828 INFO L350 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 25 treesize of output 20 [2023-02-16 03:31:56,838 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:31:56,838 INFO L350 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 23 treesize of output 18 [2023-02-16 03:31:56,900 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:31:56,900 INFO L350 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 7 [2023-02-16 03:31:56,904 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:31:56,904 INFO L350 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 9 [2023-02-16 03:31:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:57,305 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:31:57,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-02-16 03:31:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:31:57,336 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:31:57,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2023-02-16 03:31:57,347 INFO L321 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-02-16 03:31:57,347 INFO L350 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 16 treesize of output 11 [2023-02-16 03:31:57,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:31:57,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:31:57,376 INFO L350 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 13 treesize of output 9 [2023-02-16 03:31:57,390 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:31:57,492 INFO L350 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 [2023-02-16 03:31:57,580 INFO L350 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 36 treesize of output 28 [2023-02-16 03:31:57,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:31:57,586 INFO L350 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 30 treesize of output 28 [2023-02-16 03:31:57,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-16 03:31:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:31:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:31:57,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:31:58,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223713998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:31:58,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:31:58,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2023-02-16 03:31:58,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064530660] [2023-02-16 03:31:58,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:31:58,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:31:58,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:31:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:31:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1343, Unknown=15, NotChecked=0, Total=1482 [2023-02-16 03:31:58,169 INFO L87 Difference]: Start difference. First operand 194 states and 221 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:32:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:01,502 INFO L93 Difference]: Finished difference Result 268 states and 303 transitions. [2023-02-16 03:32:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:32:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2023-02-16 03:32:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:01,504 INFO L225 Difference]: With dead ends: 268 [2023-02-16 03:32:01,504 INFO L226 Difference]: Without dead ends: 268 [2023-02-16 03:32:01,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=292, Invalid=2654, Unknown=24, NotChecked=0, Total=2970 [2023-02-16 03:32:01,505 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 604 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 87 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:01,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1194 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3064 Invalid, 32 Unknown, 0 Unchecked, 2.4s Time] [2023-02-16 03:32:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-16 03:32:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 194. [2023-02-16 03:32:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.411764705882353) internal successors, (192), 178 states have internal predecessors, (192), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:32:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 220 transitions. [2023-02-16 03:32:01,509 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 220 transitions. Word has length 66 [2023-02-16 03:32:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:01,509 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 220 transitions. [2023-02-16 03:32:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 30 states have internal predecessors, (87), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:32:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 220 transitions. [2023-02-16 03:32:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 03:32:01,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:01,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:01,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 03:32:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:01,721 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:32:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -574790864, now seen corresponding path program 1 times [2023-02-16 03:32:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:01,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606432235] [2023-02-16 03:32:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:03,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:32:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:32:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:32:06,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606432235] [2023-02-16 03:32:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606432235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462149141] [2023-02-16 03:32:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:32:06,294 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) [2023-02-16 03:32:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:32:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 138 conjunts are in the unsatisfiable core [2023-02-16 03:32:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:32:06,609 INFO L350 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 11 treesize of output 7 [2023-02-16 03:32:06,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:32:06,765 INFO L350 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 15 treesize of output 21 [2023-02-16 03:32:06,768 INFO L350 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 6 treesize of output 4 [2023-02-16 03:32:06,851 INFO L350 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 12 treesize of output 8 [2023-02-16 03:32:06,895 INFO L350 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 [2023-02-16 03:32:07,390 INFO L350 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 [2023-02-16 03:32:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:07,499 INFO L350 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 34 treesize of output 29 [2023-02-16 03:32:07,502 INFO L350 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 0 case distinctions, treesize of input 29 treesize of output 24 [2023-02-16 03:32:07,515 INFO L350 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 12 treesize of output 11 [2023-02-16 03:32:07,751 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:32:07,751 INFO L350 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 23 treesize of output 18 [2023-02-16 03:32:07,768 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-02-16 03:32:07,768 INFO L350 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2023-02-16 03:32:07,891 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-16 03:32:07,891 INFO L350 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 44 treesize of output 23 [2023-02-16 03:32:07,894 INFO L350 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 [2023-02-16 03:32:07,899 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:07,899 INFO L350 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 7 [2023-02-16 03:32:08,311 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2796 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2795 (Array Int Int)) (v_ArrVal_2794 (Array Int Int)) (v_ArrVal_2793 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2794) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2796)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2793) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2795)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-16 03:32:08,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:08,348 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-16 03:32:08,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 38 [2023-02-16 03:32:08,355 INFO L350 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 [2023-02-16 03:32:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:08,383 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2023-02-16 03:32:08,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 76 [2023-02-16 03:32:08,393 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-02-16 03:32:08,393 INFO L350 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 13 treesize of output 13 [2023-02-16 03:32:08,397 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:08,400 INFO L350 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 29 treesize of output 23 [2023-02-16 03:32:08,574 INFO L350 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 [2023-02-16 03:32:08,807 INFO L350 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 100 treesize of output 88 [2023-02-16 03:32:08,972 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-02-16 03:32:08,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 119 [2023-02-16 03:32:09,225 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:09,226 INFO L350 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2023-02-16 03:32:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-16 03:32:09,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:32:09,484 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:09,484 INFO L350 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 19 treesize of output 15 [2023-02-16 03:32:09,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462149141] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:09,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:32:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 62 [2023-02-16 03:32:09,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089540304] [2023-02-16 03:32:09,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:32:09,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-16 03:32:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-16 03:32:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4222, Unknown=7, NotChecked=130, Total=4556 [2023-02-16 03:32:09,756 INFO L87 Difference]: Start difference. First operand 194 states and 220 transitions. Second operand has 62 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:32:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:16,649 INFO L93 Difference]: Finished difference Result 282 states and 320 transitions. [2023-02-16 03:32:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 03:32:16,649 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 71 [2023-02-16 03:32:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:16,650 INFO L225 Difference]: With dead ends: 282 [2023-02-16 03:32:16,651 INFO L226 Difference]: Without dead ends: 282 [2023-02-16 03:32:16,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=590, Invalid=8334, Unknown=10, NotChecked=186, Total=9120 [2023-02-16 03:32:16,652 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 750 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 5890 mSolverCounterSat, 154 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 6347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5890 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:16,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 2689 Invalid, 6347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5890 Invalid, 4 Unknown, 299 Unchecked, 3.6s Time] [2023-02-16 03:32:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-16 03:32:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 196. [2023-02-16 03:32:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 138 states have (on average 1.4130434782608696) internal successors, (195), 180 states have internal predecessors, (195), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 03:32:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2023-02-16 03:32:16,657 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 71 [2023-02-16 03:32:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:16,657 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2023-02-16 03:32:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:32:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2023-02-16 03:32:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 03:32:16,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:16,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:16,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:32:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:16,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:32:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -574800934, now seen corresponding path program 1 times [2023-02-16 03:32:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603874521] [2023-02-16 03:32:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:32:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:32:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:32:20,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:20,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603874521] [2023-02-16 03:32:20,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603874521] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:20,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221798655] [2023-02-16 03:32:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:20,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:20,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:32:20,081 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) [2023-02-16 03:32:20,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:32:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 188 conjunts are in the unsatisfiable core [2023-02-16 03:32:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:32:20,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:32:20,510 INFO L350 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 [2023-02-16 03:32:20,512 INFO L350 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 [2023-02-16 03:32:20,765 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:32:20,766 INFO L350 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 1 case distinctions, treesize of input 23 treesize of output 18 [2023-02-16 03:32:20,778 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:32:20,778 INFO L350 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 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-16 03:32:20,867 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:20,867 INFO L350 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 11 treesize of output 3 [2023-02-16 03:32:20,871 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:20,871 INFO L350 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 7 [2023-02-16 03:32:20,919 INFO L350 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 [2023-02-16 03:32:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,831 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-02-16 03:32:21,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 34 [2023-02-16 03:32:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:21,852 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-16 03:32:21,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 43 [2023-02-16 03:32:21,857 INFO L350 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 0 case distinctions, treesize of input 24 treesize of output 19 [2023-02-16 03:32:21,863 INFO L350 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 10 treesize of output 9 [2023-02-16 03:32:21,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 03:32:21,873 INFO L350 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 0 case distinctions, treesize of input 25 treesize of output 20 [2023-02-16 03:32:21,889 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:21,909 INFO L350 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 0 case distinctions, treesize of input 18 treesize of output 15 [2023-02-16 03:32:22,268 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2023-02-16 03:32:22,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 71 [2023-02-16 03:32:22,289 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2023-02-16 03:32:22,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 105 treesize of output 98 [2023-02-16 03:32:22,485 INFO L321 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2023-02-16 03:32:22,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 54 [2023-02-16 03:32:22,490 INFO L350 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 39 treesize of output 35 [2023-02-16 03:32:22,498 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-02-16 03:32:22,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 37 [2023-02-16 03:32:22,993 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_3126 (Array Int Int)) (v_ArrVal_3127 (Array Int Int)) (v_ArrVal_3128 (Array Int Int)) (v_ArrVal_3129 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3127) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3129)) (= 0 (select |c_old(#valid)| |chain_node_~node~0#1.base|)) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3126) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3128)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:32:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,064 INFO L321 Elim1Store]: treesize reduction 74, result has 35.1 percent of original size [2023-02-16 03:32:23,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 96 treesize of output 117 [2023-02-16 03:32:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:23,116 INFO L321 Elim1Store]: treesize reduction 94, result has 30.9 percent of original size [2023-02-16 03:32:23,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 94 treesize of output 120 [2023-02-16 03:32:23,125 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-02-16 03:32:23,125 INFO L350 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 65 treesize of output 61 [2023-02-16 03:32:23,162 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,204 INFO L350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2023-02-16 03:32:23,241 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,253 INFO L350 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 44 treesize of output 34 [2023-02-16 03:32:23,263 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,266 INFO L350 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 82 treesize of output 64 [2023-02-16 03:32:23,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,330 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,350 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,353 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,358 INFO L350 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 7 [2023-02-16 03:32:23,362 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:32:23,723 INFO L350 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 [2023-02-16 03:32:24,327 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-02-16 03:32:24,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 190 [2023-02-16 03:32:24,763 INFO L321 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2023-02-16 03:32:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 44 [2023-02-16 03:32:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:24,773 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:32:24,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2023-02-16 03:32:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-16 03:32:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:32:25,379 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:25,380 INFO L350 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 19 treesize of output 15 [2023-02-16 03:32:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221798655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:25,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:32:25,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 69 [2023-02-16 03:32:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746620630] [2023-02-16 03:32:25,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:32:25,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-16 03:32:25,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-16 03:32:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5634, Unknown=6, NotChecked=150, Total=6006 [2023-02-16 03:32:25,802 INFO L87 Difference]: Start difference. First operand 196 states and 223 transitions. Second operand has 69 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:32:28,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:32:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:44,539 INFO L93 Difference]: Finished difference Result 454 states and 520 transitions. [2023-02-16 03:32:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-16 03:32:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 71 [2023-02-16 03:32:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:44,543 INFO L225 Difference]: With dead ends: 454 [2023-02-16 03:32:44,543 INFO L226 Difference]: Without dead ends: 454 [2023-02-16 03:32:44,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=981, Invalid=14758, Unknown=15, NotChecked=248, Total=16002 [2023-02-16 03:32:44,546 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 679 mSDsluCounter, 3216 mSDsCounter, 0 mSdLazyCounter, 7322 mSolverCounterSat, 182 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 7869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 7322 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:44,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 3312 Invalid, 7869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 7322 Invalid, 19 Unknown, 346 Unchecked, 10.1s Time] [2023-02-16 03:32:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-02-16 03:32:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 250. [2023-02-16 03:32:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.3621621621621622) internal successors, (252), 229 states have internal predecessors, (252), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:32:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 290 transitions. [2023-02-16 03:32:44,555 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 290 transitions. Word has length 71 [2023-02-16 03:32:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:44,555 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 290 transitions. [2023-02-16 03:32:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:32:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 290 transitions. [2023-02-16 03:32:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 03:32:44,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:44,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:44,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:32:44,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:44,766 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:32:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1637749689, now seen corresponding path program 1 times [2023-02-16 03:32:44,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370932109] [2023-02-16 03:32:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:32:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:44,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:32:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-16 03:32:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-16 03:32:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:44,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370932109] [2023-02-16 03:32:44,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370932109] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:32:44,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:32:44,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:32:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543100537] [2023-02-16 03:32:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:32:44,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:32:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:32:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:32:44,888 INFO L87 Difference]: Start difference. First operand 250 states and 290 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 03:32:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:45,285 INFO L93 Difference]: Finished difference Result 315 states and 364 transitions. [2023-02-16 03:32:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:32:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2023-02-16 03:32:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:45,286 INFO L225 Difference]: With dead ends: 315 [2023-02-16 03:32:45,286 INFO L226 Difference]: Without dead ends: 315 [2023-02-16 03:32:45,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:32:45,287 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 135 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:45,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 551 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:32:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-02-16 03:32:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 249. [2023-02-16 03:32:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 185 states have (on average 1.3567567567567567) internal successors, (251), 228 states have internal predecessors, (251), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:32:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 289 transitions. [2023-02-16 03:32:45,292 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 289 transitions. Word has length 73 [2023-02-16 03:32:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 289 transitions. [2023-02-16 03:32:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 03:32:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 289 transitions. [2023-02-16 03:32:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 03:32:45,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:45,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:32:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-16 03:32:45,293 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:32:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:32:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1637749690, now seen corresponding path program 1 times [2023-02-16 03:32:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:32:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107352738] [2023-02-16 03:32:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:32:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:45,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:32:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:32:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:32:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-16 03:32:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:32:47,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:32:47,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107352738] [2023-02-16 03:32:47,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107352738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:47,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110363092] [2023-02-16 03:32:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:32:47,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:32:47,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:32:47,690 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) [2023-02-16 03:32:47,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:32:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:32:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-16 03:32:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:32:48,021 INFO L350 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 [2023-02-16 03:32:48,146 INFO L350 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 [2023-02-16 03:32:48,150 INFO L350 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 [2023-02-16 03:32:48,393 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:32:48,394 INFO L350 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 25 treesize of output 20 [2023-02-16 03:32:48,407 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:32:48,408 INFO L350 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 23 treesize of output 18 [2023-02-16 03:32:48,469 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:48,469 INFO L350 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 9 [2023-02-16 03:32:48,474 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:32:48,474 INFO L350 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 7 [2023-02-16 03:32:48,858 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_3622 (Array Int Int)) (v_ArrVal_3623 (Array Int Int)) (v_ArrVal_3624 (Array Int Int)) (v_ArrVal_3625 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3623) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3625)) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| 8)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3622) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3624)))) is different from true [2023-02-16 03:32:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:48,897 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:32:48,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2023-02-16 03:32:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:32:48,926 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-16 03:32:48,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-02-16 03:32:48,938 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-16 03:32:48,938 INFO L350 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 14 treesize of output 16 [2023-02-16 03:32:48,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:32:48,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:32:48,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:32:48,965 INFO L350 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 [2023-02-16 03:32:49,100 INFO L350 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 [2023-02-16 03:32:49,232 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:32:49,232 INFO L350 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 34 treesize of output 32 [2023-02-16 03:32:49,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-16 03:32:49,712 INFO L350 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 17 treesize of output 9 [2023-02-16 03:32:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-16 03:32:49,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:32:52,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:32:53,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110363092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:32:53,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:32:53,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2023-02-16 03:32:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016206689] [2023-02-16 03:32:53,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:32:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 03:32:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:32:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 03:32:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2423, Unknown=43, NotChecked=100, Total=2756 [2023-02-16 03:32:53,314 INFO L87 Difference]: Start difference. First operand 249 states and 289 transitions. Second operand has 45 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 42 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-16 03:32:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:32:59,786 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2023-02-16 03:32:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 03:32:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 42 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2023-02-16 03:32:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:32:59,787 INFO L225 Difference]: With dead ends: 367 [2023-02-16 03:32:59,787 INFO L226 Difference]: Without dead ends: 367 [2023-02-16 03:32:59,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=462, Invalid=4891, Unknown=53, NotChecked=144, Total=5550 [2023-02-16 03:32:59,811 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 755 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 4242 mSolverCounterSat, 104 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 4585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 4242 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:32:59,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1749 Invalid, 4585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 4242 Invalid, 8 Unknown, 231 Unchecked, 3.9s Time] [2023-02-16 03:32:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-16 03:32:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 248. [2023-02-16 03:32:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 185 states have (on average 1.3513513513513513) internal successors, (250), 227 states have internal predecessors, (250), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:32:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2023-02-16 03:32:59,819 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 73 [2023-02-16 03:32:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:32:59,819 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2023-02-16 03:32:59,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 42 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-16 03:32:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2023-02-16 03:32:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 03:32:59,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:32:59,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-02-16 03:32:59,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:33:00,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-16 03:33:00,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:33:00,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:33:00,032 INFO L85 PathProgramCache]: Analyzing trace with hash 633934672, now seen corresponding path program 1 times [2023-02-16 03:33:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:33:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95639483] [2023-02-16 03:33:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:00,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:33:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:33:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:33:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:33:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-16 03:33:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-16 03:33:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:33:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95639483] [2023-02-16 03:33:00,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95639483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:33:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502302183] [2023-02-16 03:33:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:00,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:33:00,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:33:00,411 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) [2023-02-16 03:33:00,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:33:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 03:33:00,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:33:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:00,703 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-02-16 03:33:00,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2023-02-16 03:33:00,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:33:00,734 INFO L350 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 7 [2023-02-16 03:33:00,748 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_4009 Int)) (= |c_#length| (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_4009))))) is different from true [2023-02-16 03:33:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:00,781 INFO L350 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 16 treesize of output 18 [2023-02-16 03:33:00,821 INFO L350 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 7 [2023-02-16 03:33:00,826 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_4010 Int)) (= |c_#length| (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_4010))))) is different from true [2023-02-16 03:33:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:00,859 INFO L350 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 16 treesize of output 18 [2023-02-16 03:33:00,901 INFO L350 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 7 [2023-02-16 03:33:00,906 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_4011 Int)) (= |c_#length| (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_4011))) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:33:00,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:00,950 INFO L350 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 16 treesize of output 18 [2023-02-16 03:33:00,973 INFO L350 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 7 [2023-02-16 03:33:00,978 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_4012 Int)) (= |c_#length| (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_4012))))) is different from true [2023-02-16 03:33:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:01,008 INFO L350 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 16 treesize of output 18 [2023-02-16 03:33:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 66 not checked. [2023-02-16 03:33:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:33:03,138 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 4))) (and (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_38| Int)) (or (forall ((v_ArrVal_4015 Int)) (let ((.cse0 (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_38| v_ArrVal_4015))) (or (<= (+ |c_ULTIMATE.start_main_~#p1~0#1.offset| 4) (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|)) (not (<= .cse1 (select .cse0 |c_ULTIMATE.start_create_sll_~#list~0#1.base|)))))) (not (< |v_chain_node_alloc_node_~ptr~0#1.base_38| |c_#StackHeapBarrier|)))) (or (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_38| Int) (v_ArrVal_4015 Int)) (or (not (<= .cse1 (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_38| v_ArrVal_4015) |c_ULTIMATE.start_create_sll_~#list~0#1.base|))) (not (< |v_chain_node_alloc_node_~ptr~0#1.base_38| |c_#StackHeapBarrier|)))) (<= 0 |c_ULTIMATE.start_main_~#p1~0#1.offset|)))) is different from false [2023-02-16 03:33:03,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502302183] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:33:03,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:33:03,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-02-16 03:33:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620591501] [2023-02-16 03:33:03,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:33:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:33:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:33:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:33:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=196, Unknown=5, NotChecked=160, Total=420 [2023-02-16 03:33:03,141 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-16 03:33:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:33:03,658 INFO L93 Difference]: Finished difference Result 260 states and 301 transitions. [2023-02-16 03:33:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:33:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2023-02-16 03:33:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:33:03,660 INFO L225 Difference]: With dead ends: 260 [2023-02-16 03:33:03,660 INFO L226 Difference]: Without dead ends: 260 [2023-02-16 03:33:03,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=104, Invalid=331, Unknown=5, NotChecked=210, Total=650 [2023-02-16 03:33:03,661 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 488 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:33:03,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 301 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 748 Invalid, 0 Unknown, 784 Unchecked, 0.4s Time] [2023-02-16 03:33:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-16 03:33:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 242. [2023-02-16 03:33:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 180 states have (on average 1.35) internal successors, (243), 221 states have internal predecessors, (243), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:33:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 281 transitions. [2023-02-16 03:33:03,666 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 281 transitions. Word has length 73 [2023-02-16 03:33:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:33:03,666 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 281 transitions. [2023-02-16 03:33:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-16 03:33:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 281 transitions. [2023-02-16 03:33:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-16 03:33:03,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:33:03,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:33:03,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:33:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-16 03:33:03,874 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:33:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:33:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -627255358, now seen corresponding path program 1 times [2023-02-16 03:33:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:33:03,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615125035] [2023-02-16 03:33:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:33:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:33:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:33:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:33:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-16 03:33:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:33:07,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:33:07,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615125035] [2023-02-16 03:33:07,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615125035] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:33:07,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686746218] [2023-02-16 03:33:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:07,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:33:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:33:07,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:33:07,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:33:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-16 03:33:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:33:07,941 INFO L350 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 [2023-02-16 03:33:08,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:33:08,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:33:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:33:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:33:08,332 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-02-16 03:33:08,332 INFO L350 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 21 treesize of output 20 [2023-02-16 03:33:08,350 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-02-16 03:33:08,351 INFO L350 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 21 treesize of output 30 [2023-02-16 03:33:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,768 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:33:08,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-02-16 03:33:08,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,783 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:33:08,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 47 [2023-02-16 03:33:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,925 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:33:08,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 27 [2023-02-16 03:33:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:08,935 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:33:08,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 13 [2023-02-16 03:33:08,940 INFO L350 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 [2023-02-16 03:33:09,430 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_4315 (Array Int Int)) (v_ArrVal_4316 (Array Int Int)) (v_ArrVal_4317 (Array Int Int)) (v_ArrVal_4318 (Array Int Int))) (and (= 0 (select |c_old(#valid)| |chain_node_~node~0#1.base|)) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4315) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4317)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4316) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4318)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:33:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,476 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-16 03:33:09,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 61 [2023-02-16 03:33:09,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:09,509 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2023-02-16 03:33:09,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 84 [2023-02-16 03:33:09,521 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-02-16 03:33:09,521 INFO L350 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 13 treesize of output 13 [2023-02-16 03:33:09,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:33:09,534 INFO L350 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 37 treesize of output 29 [2023-02-16 03:33:09,552 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:33:09,555 INFO L350 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 11 treesize of output 7 [2023-02-16 03:33:09,820 INFO L350 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 [2023-02-16 03:33:09,996 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:33:09,996 INFO L350 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 109 treesize of output 107 [2023-02-16 03:33:10,652 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:33:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:10,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:33:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 40 [2023-02-16 03:33:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:10,664 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-16 03:33:10,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2023-02-16 03:33:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-16 03:33:10,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:33:10,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:33:11,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686746218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:33:11,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:33:11,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 57 [2023-02-16 03:33:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390737942] [2023-02-16 03:33:11,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:33:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-16 03:33:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:33:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-16 03:33:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3438, Unknown=10, NotChecked=118, Total=3782 [2023-02-16 03:33:11,277 INFO L87 Difference]: Start difference. First operand 242 states and 281 transitions. Second operand has 57 states, 55 states have (on average 2.381818181818182) internal successors, (131), 55 states have internal predecessors, (131), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-16 03:33:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:33:19,914 INFO L93 Difference]: Finished difference Result 456 states and 522 transitions. [2023-02-16 03:33:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-16 03:33:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.381818181818182) internal successors, (131), 55 states have internal predecessors, (131), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 76 [2023-02-16 03:33:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:33:19,916 INFO L225 Difference]: With dead ends: 456 [2023-02-16 03:33:19,916 INFO L226 Difference]: Without dead ends: 456 [2023-02-16 03:33:19,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=719, Invalid=7637, Unknown=20, NotChecked=180, Total=8556 [2023-02-16 03:33:19,917 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 688 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 5010 mSolverCounterSat, 143 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 5436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5010 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:33:19,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 2406 Invalid, 5436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5010 Invalid, 17 Unknown, 266 Unchecked, 4.2s Time] [2023-02-16 03:33:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-16 03:33:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 253. [2023-02-16 03:33:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 190 states have (on average 1.331578947368421) internal successors, (253), 231 states have internal predecessors, (253), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 03:33:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 293 transitions. [2023-02-16 03:33:19,925 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 293 transitions. Word has length 76 [2023-02-16 03:33:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:33:19,926 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 293 transitions. [2023-02-16 03:33:19,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.381818181818182) internal successors, (131), 55 states have internal predecessors, (131), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-16 03:33:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 293 transitions. [2023-02-16 03:33:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-16 03:33:19,927 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:33:19,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:33:19,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:33:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-16 03:33:20,134 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-02-16 03:33:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:33:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2029804448, now seen corresponding path program 1 times [2023-02-16 03:33:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:33:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98853344] [2023-02-16 03:33:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:33:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:21,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:33:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:33:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 03:33:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:23,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-16 03:33:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:33:23,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:33:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98853344] [2023-02-16 03:33:23,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98853344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:33:23,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021799722] [2023-02-16 03:33:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:33:23,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:33:23,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:33:23,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:33:23,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:33:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:33:24,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 167 conjunts are in the unsatisfiable core [2023-02-16 03:33:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:33:24,089 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-02-16 03:33:24,089 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-02-16 03:33:24,455 INFO L350 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 [2023-02-16 03:33:24,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:33:24,528 INFO L321 Elim1Store]: treesize reduction 18, result has 30.8 percent of original size [2023-02-16 03:33:24,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2023-02-16 03:33:24,666 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:33:24,666 INFO L350 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 24 treesize of output 28 [2023-02-16 03:33:24,670 INFO L350 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 14 treesize of output 10 [2023-02-16 03:33:25,425 INFO L350 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 [2023-02-16 03:33:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:25,559 INFO L350 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 54 treesize of output 47 [2023-02-16 03:33:25,563 INFO L350 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 0 case distinctions, treesize of input 47 treesize of output 40 [2023-02-16 03:33:25,613 INFO L321 Elim1Store]: treesize reduction 78, result has 45.1 percent of original size [2023-02-16 03:33:25,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 99 [2023-02-16 03:33:25,619 INFO L350 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 12 treesize of output 11 [2023-02-16 03:33:26,059 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:33:26,059 INFO L350 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 23 treesize of output 18 [2023-02-16 03:33:26,082 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-16 03:33:26,082 INFO L350 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 70 [2023-02-16 03:33:26,320 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-02-16 03:33:26,321 INFO L350 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 118 treesize of output 73 [2023-02-16 03:33:26,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:33:26,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 122 [2023-02-16 03:33:26,364 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 03:33:26,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-02-16 03:33:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:27,388 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2023-02-16 03:33:27,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 121 [2023-02-16 03:33:27,485 INFO L321 Elim1Store]: treesize reduction 186, result has 33.1 percent of original size [2023-02-16 03:33:27,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 99 treesize of output 169 [2023-02-16 03:33:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:33:27,511 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-16 03:33:27,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 40 [2023-02-16 03:33:27,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:33:27,521 INFO L350 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 [2023-02-16 03:33:27,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-16 03:33:27,744 INFO L350 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 113 treesize of output 91 [2023-02-16 03:33:29,128 INFO L321 Elim1Store]: treesize reduction 970, result has 22.3 percent of original size [2023-02-16 03:33:29,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 304 treesize of output 536