./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:02:32,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:02:32,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:02:32,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:02:32,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:02:32,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:02:32,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:02:32,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:02:32,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:02:32,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:02:32,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:02:32,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:02:32,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:02:32,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:02:32,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:02:32,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:02:32,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:02:32,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:02:32,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:02:32,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:02:32,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:02:32,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:02:32,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:02:32,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:02:32,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:02:32,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:02:32,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:02:32,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:02:32,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:02:32,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:02:32,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:02:32,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:02:32,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:02:32,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:02:32,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:02:32,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:02:32,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:02:32,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:02:32,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:02:32,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:02:32,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:02:32,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:02:32,548 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:02:32,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:02:32,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:02:32,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:02:32,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:02:32,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:02:32,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:02:32,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:02:32,550 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:02:32,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:02:32,550 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:02:32,551 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:02:32,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:02:32,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:02:32,552 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:02:32,552 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:02:32,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:02:32,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:02:32,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:02:32,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:02:32,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:02:32,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:02:32,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:02:32,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:02:32,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:02:32,556 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:02:32,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:02:32,557 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:02:32,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-02-17 03:02:32,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:02:32,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:02:32,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:02:32,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:02:32,880 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:02:32,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-17 03:02:34,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:02:34,233 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:02:34,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-17 03:02:34,239 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/359f4f2f1/70a8e9bf3de04e42aca532b8032aeb8f/FLAG1b2722c3a [2023-02-17 03:02:34,261 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/359f4f2f1/70a8e9bf3de04e42aca532b8032aeb8f [2023-02-17 03:02:34,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:02:34,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:02:34,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:02:34,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:02:34,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:02:34,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd0568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34, skipping insertion in model container [2023-02-17 03:02:34,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:02:34,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:02:34,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:02:34,436 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:02:34,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:02:34,464 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:02:34,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34 WrapperNode [2023-02-17 03:02:34,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:02:34,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:02:34,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:02:34,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:02:34,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,503 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-17 03:02:34,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:02:34,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:02:34,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:02:34,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:02:34,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:02:34,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:02:34,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:02:34,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:02:34,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (1/1) ... [2023-02-17 03:02:34,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:02:34,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:34,586 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) [2023-02-17 03:02:34,616 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 [2023-02-17 03:02:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 03:02:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:02:34,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:02:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 03:02:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:02:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:02:34,700 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:02:34,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:02:34,831 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:02:34,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:02:34,837 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 03:02:34,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:02:34 BoogieIcfgContainer [2023-02-17 03:02:34,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:02:34,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:02:34,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:02:34,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:02:34,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:02:34" (1/3) ... [2023-02-17 03:02:34,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513814f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:02:34, skipping insertion in model container [2023-02-17 03:02:34,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:02:34" (2/3) ... [2023-02-17 03:02:34,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513814f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:02:34, skipping insertion in model container [2023-02-17 03:02:34,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:02:34" (3/3) ... [2023-02-17 03:02:34,846 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-02-17 03:02:34,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:02:34,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 03:02:34,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:02:34,916 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;@171fdf98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:02:34,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 03:02:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 03:02:34,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:34,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 03:02:34,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-17 03:02:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701069779] [2023-02-17 03:02:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:35,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701069779] [2023-02-17 03:02:35,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701069779] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:35,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:35,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:02:35,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961825730] [2023-02-17 03:02:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:35,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:02:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:02:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:02:35,275 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 03:02:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:35,340 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-17 03:02:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:02:35,344 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), 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 5 [2023-02-17 03:02:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:35,363 INFO L225 Difference]: With dead ends: 59 [2023-02-17 03:02:35,364 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 03:02:35,365 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 [2023-02-17 03:02:35,369 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:35,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 03:02:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-17 03:02:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 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) [2023-02-17 03:02:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-17 03:02:35,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-17 03:02:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:35,414 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-17 03:02:35,414 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), 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) [2023-02-17 03:02:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-17 03:02:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 03:02:35,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:35,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 03:02:35,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:02:35,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-17 03:02:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:35,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237436839] [2023-02-17 03:02:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237436839] [2023-02-17 03:02:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237436839] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:35,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:02:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647656611] [2023-02-17 03:02:35,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:35,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:02:35,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:02:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:02:35,510 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:35,573 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-17 03:02:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:02:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 03:02:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:35,576 INFO L225 Difference]: With dead ends: 58 [2023-02-17 03:02:35,577 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 03:02:35,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:02:35,579 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 03:02:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-17 03:02:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 03:02:35,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-17 03:02:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:35,587 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 03:02:35,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 03:02:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 03:02:35,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:35,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 03:02:35,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:02:35,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-17 03:02:35,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:35,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143744621] [2023-02-17 03:02:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:35,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143744621] [2023-02-17 03:02:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143744621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:35,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:02:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868681911] [2023-02-17 03:02:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:02:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:02:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:02:35,737 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:35,781 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-17 03:02:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:02:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 03:02:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:35,782 INFO L225 Difference]: With dead ends: 32 [2023-02-17 03:02:35,783 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 03:02:35,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:02:35,784 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:35,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 03:02:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 03:02:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-17 03:02:35,792 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-17 03:02:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:35,792 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-17 03:02:35,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-17 03:02:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 03:02:35,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:35,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 03:02:35,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:02:35,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-17 03:02:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:35,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799070697] [2023-02-17 03:02:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799070697] [2023-02-17 03:02:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799070697] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:35,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:35,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:02:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759550786] [2023-02-17 03:02:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:02:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:02:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:02:35,957 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:36,045 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-17 03:02:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:02:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 03:02:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:36,047 INFO L225 Difference]: With dead ends: 55 [2023-02-17 03:02:36,047 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 03:02:36,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:02:36,048 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:36,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 03:02:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-17 03:02:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 03:02:36,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-17 03:02:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:36,053 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 03:02:36,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 03:02:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 03:02:36,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:36,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:36,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 03:02:36,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-17 03:02:36,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696276377] [2023-02-17 03:02:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696276377] [2023-02-17 03:02:36,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696276377] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:36,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:36,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:02:36,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824758026] [2023-02-17 03:02:36,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:36,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:02:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:02:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:02:36,134 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-17 03:02:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:36,197 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-17 03:02:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:02:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-02-17 03:02:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:36,198 INFO L225 Difference]: With dead ends: 60 [2023-02-17 03:02:36,198 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 03:02:36,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:02:36,199 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:36,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 03:02:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2023-02-17 03:02:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-17 03:02:36,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2023-02-17 03:02:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:36,204 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-17 03:02:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-17 03:02:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-17 03:02:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 03:02:36,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:36,205 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:02:36,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-17 03:02:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:36,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274857370] [2023-02-17 03:02:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274857370] [2023-02-17 03:02:36,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274857370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:36,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382498941] [2023-02-17 03:02:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:36,285 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) [2023-02-17 03:02:36,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:02:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 03:02:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382498941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:36,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:36,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-17 03:02:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633639091] [2023-02-17 03:02:36,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:02:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:02:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:02:36,427 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-02-17 03:02:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:36,514 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2023-02-17 03:02:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:02:36,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 10 [2023-02-17 03:02:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:36,520 INFO L225 Difference]: With dead ends: 130 [2023-02-17 03:02:36,520 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 03:02:36,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:02:36,527 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 164 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:36,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 03:02:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2023-02-17 03:02:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 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) [2023-02-17 03:02:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-02-17 03:02:36,540 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2023-02-17 03:02:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:36,540 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-02-17 03:02:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-02-17 03:02:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-02-17 03:02:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:02:36,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:36,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:36,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:36,749 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,SelfDestructingSolverStorable5 [2023-02-17 03:02:36,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-17 03:02:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:36,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069774371] [2023-02-17 03:02:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:36,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069774371] [2023-02-17 03:02:36,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069774371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119786733] [2023-02-17 03:02:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:36,881 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) [2023-02-17 03:02:36,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:02:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:36,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 03:02:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:36,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:36,971 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 03:02:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:36,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:37,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119786733] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:37,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:37,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 03:02:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226886737] [2023-02-17 03:02:37,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:02:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:37,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:02:37,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:02:37,032 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:37,180 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2023-02-17 03:02:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 03:02:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 03:02:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:37,182 INFO L225 Difference]: With dead ends: 129 [2023-02-17 03:02:37,182 INFO L226 Difference]: Without dead ends: 129 [2023-02-17 03:02:37,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-17 03:02:37,184 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 351 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:37,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 99 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-17 03:02:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2023-02-17 03:02:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-17 03:02:37,208 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2023-02-17 03:02:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:37,209 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-17 03:02:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-17 03:02:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 03:02:37,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:37,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:37,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:37,416 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,SelfDestructingSolverStorable6 [2023-02-17 03:02:37,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2023-02-17 03:02:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:37,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837562212] [2023-02-17 03:02:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:37,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837562212] [2023-02-17 03:02:37,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837562212] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090473962] [2023-02-17 03:02:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:37,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:37,479 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) [2023-02-17 03:02:37,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:02:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 03:02:37,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:37,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:37,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090473962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:37,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:37,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-17 03:02:37,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687954550] [2023-02-17 03:02:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:37,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:02:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:02:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:02:37,583 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:37,677 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2023-02-17 03:02:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:02:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 03:02:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:37,680 INFO L225 Difference]: With dead ends: 88 [2023-02-17 03:02:37,680 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 03:02:37,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:02:37,681 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:37,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 52 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 03:02:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2023-02-17 03:02:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-17 03:02:37,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2023-02-17 03:02:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:37,687 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-17 03:02:37,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-17 03:02:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 03:02:37,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:37,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:37,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:37,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2023-02-17 03:02:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739826435] [2023-02-17 03:02:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 03:02:38,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:38,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739826435] [2023-02-17 03:02:38,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739826435] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:38,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:38,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:02:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789023643] [2023-02-17 03:02:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:38,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:02:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:02:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:02:38,018 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:38,038 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-02-17 03:02:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:02:38,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 03:02:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:38,039 INFO L225 Difference]: With dead ends: 46 [2023-02-17 03:02:38,039 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 03:02:38,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:02:38,042 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:38,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 03:02:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-17 03:02:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 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) [2023-02-17 03:02:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-17 03:02:38,045 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2023-02-17 03:02:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:38,046 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-17 03:02:38,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-17 03:02:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 03:02:38,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:38,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 03:02:38,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2023-02-17 03:02:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:38,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946791308] [2023-02-17 03:02:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946791308] [2023-02-17 03:02:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946791308] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:38,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:02:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:02:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065257594] [2023-02-17 03:02:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:02:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:02:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:02:38,149 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:38,183 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-17 03:02:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:02:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 03:02:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:38,184 INFO L225 Difference]: With dead ends: 76 [2023-02-17 03:02:38,184 INFO L226 Difference]: Without dead ends: 76 [2023-02-17 03:02:38,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:02:38,185 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:38,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-17 03:02:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-17 03:02:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 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) [2023-02-17 03:02:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-17 03:02:38,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-17 03:02:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:38,197 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-17 03:02:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-17 03:02:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 03:02:38,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:38,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:38,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 03:02:38,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-17 03:02:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759131704] [2023-02-17 03:02:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:38,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759131704] [2023-02-17 03:02:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759131704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042315342] [2023-02-17 03:02:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:38,289 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) [2023-02-17 03:02:38,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:02:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 03:02:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:38,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:38,390 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 27 treesize of output 23 [2023-02-17 03:02:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042315342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:38,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:38,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 03:02:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66155685] [2023-02-17 03:02:38,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:02:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:02:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:02:38,407 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:38,463 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-17 03:02:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:02:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-17 03:02:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:38,464 INFO L225 Difference]: With dead ends: 80 [2023-02-17 03:02:38,465 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 03:02:38,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:02:38,465 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:38,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 03:02:38,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-17 03:02:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 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) [2023-02-17 03:02:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-17 03:02:38,468 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-17 03:02:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:38,469 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-17 03:02:38,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-17 03:02:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 03:02:38,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:38,470 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-17 03:02:38,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 03:02:38,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:38,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-17 03:02:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442243137] [2023-02-17 03:02:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442243137] [2023-02-17 03:02:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442243137] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489881753] [2023-02-17 03:02:38,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:38,794 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) [2023-02-17 03:02:38,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:02:38,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:38,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 03:02:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:38,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:02:38,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489881753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:38,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:02:38,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-17 03:02:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684266242] [2023-02-17 03:02:38,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 03:02:38,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 03:02:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:02:38,904 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:38,963 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-17 03:02:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:02:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 03:02:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:38,964 INFO L225 Difference]: With dead ends: 86 [2023-02-17 03:02:38,964 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 03:02:38,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:02:38,966 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:38,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 03:02:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-17 03:02:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-17 03:02:38,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-17 03:02:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:38,971 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-17 03:02:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-17 03:02:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 03:02:38,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:38,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:38,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 03:02:39,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-17 03:02:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:39,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082141298] [2023-02-17 03:02:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:39,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082141298] [2023-02-17 03:02:39,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082141298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584783015] [2023-02-17 03:02:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:39,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:39,233 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) [2023-02-17 03:02:39,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:02:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:02:39,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:39,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:39,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584783015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:39,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:39,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2023-02-17 03:02:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803056905] [2023-02-17 03:02:39,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 03:02:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 03:02:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:02:39,376 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:39,532 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-17 03:02:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 03:02:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-17 03:02:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:39,533 INFO L225 Difference]: With dead ends: 152 [2023-02-17 03:02:39,533 INFO L226 Difference]: Without dead ends: 152 [2023-02-17 03:02:39,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:02:39,534 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:39,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 103 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-17 03:02:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-02-17 03:02:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 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) [2023-02-17 03:02:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-17 03:02:39,538 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2023-02-17 03:02:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:39,538 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-17 03:02:39,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-17 03:02:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 03:02:39,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:39,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:39,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:39,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-17 03:02:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719158886] [2023-02-17 03:02:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:39,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719158886] [2023-02-17 03:02:39,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719158886] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764434240] [2023-02-17 03:02:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:39,843 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) [2023-02-17 03:02:39,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 03:02:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 03:02:39,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:39,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764434240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:39,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:39,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-17 03:02:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623041758] [2023-02-17 03:02:39,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:39,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 03:02:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 03:02:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 03:02:39,999 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:40,136 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-17 03:02:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:02:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-17 03:02:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:40,138 INFO L225 Difference]: With dead ends: 136 [2023-02-17 03:02:40,138 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 03:02:40,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:02:40,139 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:40,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 54 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 03:02:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2023-02-17 03:02:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 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) [2023-02-17 03:02:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-17 03:02:40,144 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-17 03:02:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:40,144 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-17 03:02:40,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-17 03:02:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 03:02:40,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:40,147 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:40,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:40,360 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-17 03:02:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233522493] [2023-02-17 03:02:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233522493] [2023-02-17 03:02:40,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233522493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585189354] [2023-02-17 03:02:40,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:40,525 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) [2023-02-17 03:02:40,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 03:02:40,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:40,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:02:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:40,611 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 [2023-02-17 03:02:40,615 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 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-17 03:02:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:40,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585189354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:40,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-02-17 03:02:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361627927] [2023-02-17 03:02:40,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 03:02:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 03:02:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:02:40,703 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2023-02-17 03:02:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:40,767 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2023-02-17 03:02:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:02:40,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 03:02:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:40,768 INFO L225 Difference]: With dead ends: 165 [2023-02-17 03:02:40,768 INFO L226 Difference]: Without dead ends: 165 [2023-02-17 03:02:40,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:02:40,769 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:40,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 85 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-17 03:02:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-17 03:02:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 states have internal predecessors, (180), 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) [2023-02-17 03:02:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-17 03:02:40,773 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2023-02-17 03:02:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:40,774 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-17 03:02:40,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2023-02-17 03:02:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-17 03:02:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 03:02:40,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:40,775 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:40,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 03:02:40,980 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,SelfDestructingSolverStorable14 [2023-02-17 03:02:40,981 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-17 03:02:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:40,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865855347] [2023-02-17 03:02:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:02:41,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865855347] [2023-02-17 03:02:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865855347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139527177] [2023-02-17 03:02:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:41,094 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) [2023-02-17 03:02:41,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 03:02:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:02:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:02:41,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:02:41,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139527177] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:41,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:41,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-17 03:02:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25031068] [2023-02-17 03:02:41,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 03:02:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 03:02:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:02:41,255 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 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) [2023-02-17 03:02:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:41,427 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-17 03:02:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 03:02:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 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 42 [2023-02-17 03:02:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:41,430 INFO L225 Difference]: With dead ends: 159 [2023-02-17 03:02:41,430 INFO L226 Difference]: Without dead ends: 159 [2023-02-17 03:02:41,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-02-17 03:02:41,431 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 119 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:41,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 110 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-17 03:02:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-17 03:02:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 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) [2023-02-17 03:02:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2023-02-17 03:02:41,435 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2023-02-17 03:02:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:41,435 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2023-02-17 03:02:41,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 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) [2023-02-17 03:02:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2023-02-17 03:02:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 03:02:41,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:41,437 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-17 03:02:41,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:41,643 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,SelfDestructingSolverStorable15 [2023-02-17 03:02:41,643 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-17 03:02:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:41,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527530783] [2023-02-17 03:02:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:41,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527530783] [2023-02-17 03:02:41,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527530783] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104047024] [2023-02-17 03:02:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:41,806 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) [2023-02-17 03:02:41,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 03:02:41,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 03:02:41,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:41,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 03:02:42,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104047024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:42,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:42,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-02-17 03:02:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592028810] [2023-02-17 03:02:42,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 03:02:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 03:02:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-02-17 03:02:42,021 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2023-02-17 03:02:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:42,285 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2023-02-17 03:02:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 03:02:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 64 [2023-02-17 03:02:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:42,287 INFO L225 Difference]: With dead ends: 167 [2023-02-17 03:02:42,287 INFO L226 Difference]: Without dead ends: 167 [2023-02-17 03:02:42,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 03:02:42,288 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 195 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:42,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 97 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-17 03:02:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2023-02-17 03:02:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-02-17 03:02:42,291 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 64 [2023-02-17 03:02:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:42,291 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-02-17 03:02:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2023-02-17 03:02:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-02-17 03:02:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-17 03:02:42,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:42,292 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 03:02:42,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:42,492 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,SelfDestructingSolverStorable16 [2023-02-17 03:02:42,493 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash -831517957, now seen corresponding path program 3 times [2023-02-17 03:02:42,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:42,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911193965] [2023-02-17 03:02:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:42,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 221 proven. 133 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 03:02:42,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911193965] [2023-02-17 03:02:42,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911193965] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055985142] [2023-02-17 03:02:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:42,699 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) [2023-02-17 03:02:42,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 03:02:42,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 03:02:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 03:02:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-17 03:02:42,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-17 03:02:43,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055985142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:43,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:43,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-02-17 03:02:43,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855464686] [2023-02-17 03:02:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:43,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 03:02:43,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 03:02:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:02:43,009 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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) [2023-02-17 03:02:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:44,056 INFO L93 Difference]: Finished difference Result 460 states and 509 transitions. [2023-02-17 03:02:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-17 03:02:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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 86 [2023-02-17 03:02:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:44,058 INFO L225 Difference]: With dead ends: 460 [2023-02-17 03:02:44,058 INFO L226 Difference]: Without dead ends: 460 [2023-02-17 03:02:44,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 03:02:44,060 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 879 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:44,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 182 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:02:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-02-17 03:02:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 208. [2023-02-17 03:02:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.187192118226601) internal successors, (241), 207 states have internal predecessors, (241), 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) [2023-02-17 03:02:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 241 transitions. [2023-02-17 03:02:44,065 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 241 transitions. Word has length 86 [2023-02-17 03:02:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:44,066 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 241 transitions. [2023-02-17 03:02:44,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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) [2023-02-17 03:02:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 241 transitions. [2023-02-17 03:02:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 03:02:44,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:44,066 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 03:02:44,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:44,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 03:02:44,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-17 03:02:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:44,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543275031] [2023-02-17 03:02:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:44,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 03:02:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543275031] [2023-02-17 03:02:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543275031] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:44,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80274788] [2023-02-17 03:02:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:44,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:44,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:44,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 03:02:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 03:02:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:44,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:44,711 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 03:02:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 03:02:44,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 03:02:44,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80274788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:44,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:44,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-17 03:02:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441196163] [2023-02-17 03:02:44,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:44,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 03:02:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 03:02:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-02-17 03:02:44,931 INFO L87 Difference]: Start difference. First operand 208 states and 241 transitions. Second operand has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 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) [2023-02-17 03:02:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:45,340 INFO L93 Difference]: Finished difference Result 408 states and 473 transitions. [2023-02-17 03:02:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 03:02:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 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 92 [2023-02-17 03:02:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:45,343 INFO L225 Difference]: With dead ends: 408 [2023-02-17 03:02:45,343 INFO L226 Difference]: Without dead ends: 408 [2023-02-17 03:02:45,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 03:02:45,344 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 571 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:45,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 192 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-17 03:02:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 210. [2023-02-17 03:02:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1365853658536584) internal successors, (233), 209 states have internal predecessors, (233), 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) [2023-02-17 03:02:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 233 transitions. [2023-02-17 03:02:45,350 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 233 transitions. Word has length 92 [2023-02-17 03:02:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:45,350 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 233 transitions. [2023-02-17 03:02:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 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) [2023-02-17 03:02:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 233 transitions. [2023-02-17 03:02:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-17 03:02:45,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:45,356 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:45,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:45,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 448185099, now seen corresponding path program 2 times [2023-02-17 03:02:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250512008] [2023-02-17 03:02:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 132 proven. 297 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-17 03:02:45,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250512008] [2023-02-17 03:02:45,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250512008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:45,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413014214] [2023-02-17 03:02:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:45,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:45,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 03:02:45,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 03:02:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:02:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:46,035 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_22| Int) (v_ArrVal_401 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (v_ArrVal_400 Int) (v_ArrVal_402 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_401) |v_ULTIMATE.start_main_~#mask~0#1.base_17| v_ArrVal_400) |v_ULTIMATE.start_main_~#b~0#1.base_22| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22|)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_402) |v_ULTIMATE.start_main_~#mask~0#1.base_17|) 0))) is different from true [2023-02-17 03:02:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-02-17 03:02:46,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:02:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413014214] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:46,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:02:46,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2023-02-17 03:02:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725916356] [2023-02-17 03:02:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:46,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:02:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:02:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=96, Unknown=1, NotChecked=20, Total=156 [2023-02-17 03:02:46,041 INFO L87 Difference]: Start difference. First operand 210 states and 233 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-02-17 03:02:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:46,056 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2023-02-17 03:02:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:02:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 102 [2023-02-17 03:02:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:46,058 INFO L225 Difference]: With dead ends: 211 [2023-02-17 03:02:46,058 INFO L226 Difference]: Without dead ends: 209 [2023-02-17 03:02:46,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=96, Unknown=1, NotChecked=20, Total=156 [2023-02-17 03:02:46,059 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:46,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2023-02-17 03:02:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-02-17 03:02:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-02-17 03:02:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 states have internal predecessors, (228), 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) [2023-02-17 03:02:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2023-02-17 03:02:46,063 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 102 [2023-02-17 03:02:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:46,063 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2023-02-17 03:02:46,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-02-17 03:02:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2023-02-17 03:02:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-17 03:02:46,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:46,064 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:46,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-17 03:02:46,270 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 1 times [2023-02-17 03:02:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456654166] [2023-02-17 03:02:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:46,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 132 proven. 297 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 03:02:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456654166] [2023-02-17 03:02:46,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456654166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629218596] [2023-02-17 03:02:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:46,528 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:46,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 03:02:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:02:46,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 03:02:46,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 03:02:46,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629218596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:46,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:46,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-17 03:02:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033877565] [2023-02-17 03:02:46,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 03:02:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 03:02:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-02-17 03:02:46,824 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 22 states, 22 states have (on average 5.863636363636363) internal successors, (129), 22 states have internal predecessors, (129), 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) [2023-02-17 03:02:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:47,262 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2023-02-17 03:02:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 03:02:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.863636363636363) internal successors, (129), 22 states have internal predecessors, (129), 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 103 [2023-02-17 03:02:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:47,264 INFO L225 Difference]: With dead ends: 211 [2023-02-17 03:02:47,264 INFO L226 Difference]: Without dead ends: 211 [2023-02-17 03:02:47,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 03:02:47,265 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:47,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 129 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:02:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-17 03:02:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-17 03:02:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 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) [2023-02-17 03:02:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2023-02-17 03:02:47,269 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2023-02-17 03:02:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:47,269 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2023-02-17 03:02:47,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.863636363636363) internal successors, (129), 22 states have internal predecessors, (129), 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) [2023-02-17 03:02:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2023-02-17 03:02:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-17 03:02:47,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:47,270 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:47,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:47,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:47,478 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 2 times [2023-02-17 03:02:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604600943] [2023-02-17 03:02:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 03:02:47,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604600943] [2023-02-17 03:02:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604600943] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678285268] [2023-02-17 03:02:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:47,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:47,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:47,640 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 03:02:47,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:47,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:02:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-17 03:02:47,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:47,873 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 36 treesize of output 32 [2023-02-17 03:02:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-17 03:02:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678285268] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:47,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:47,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-02-17 03:02:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762157281] [2023-02-17 03:02:47,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 03:02:47,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 03:02:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-17 03:02:47,917 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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) [2023-02-17 03:02:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:48,118 INFO L93 Difference]: Finished difference Result 285 states and 304 transitions. [2023-02-17 03:02:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 03:02:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 108 [2023-02-17 03:02:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:48,120 INFO L225 Difference]: With dead ends: 285 [2023-02-17 03:02:48,120 INFO L226 Difference]: Without dead ends: 285 [2023-02-17 03:02:48,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-02-17 03:02:48,121 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:48,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 212 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-17 03:02:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 216. [2023-02-17 03:02:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.1042654028436019) internal successors, (233), 215 states have internal predecessors, (233), 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) [2023-02-17 03:02:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2023-02-17 03:02:48,126 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 108 [2023-02-17 03:02:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:48,126 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2023-02-17 03:02:48,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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) [2023-02-17 03:02:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2023-02-17 03:02:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-17 03:02:48,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:48,127 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 03:02:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:48,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:48,328 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2023-02-17 03:02:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:48,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165454392] [2023-02-17 03:02:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:48,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 208 proven. 710 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-17 03:02:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:48,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165454392] [2023-02-17 03:02:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165454392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36837797] [2023-02-17 03:02:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:02:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:48,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:48,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 03:02:48,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:02:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 03:02:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-17 03:02:49,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-17 03:02:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36837797] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:49,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:49,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-17 03:02:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934525209] [2023-02-17 03:02:49,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 03:02:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 03:02:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 03:02:49,220 INFO L87 Difference]: Start difference. First operand 216 states and 233 transitions. Second operand has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 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) [2023-02-17 03:02:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:50,472 INFO L93 Difference]: Finished difference Result 415 states and 441 transitions. [2023-02-17 03:02:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-17 03:02:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 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 121 [2023-02-17 03:02:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:50,475 INFO L225 Difference]: With dead ends: 415 [2023-02-17 03:02:50,475 INFO L226 Difference]: Without dead ends: 415 [2023-02-17 03:02:50,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 212 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2896, Invalid=7816, Unknown=0, NotChecked=0, Total=10712 [2023-02-17 03:02:50,479 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 469 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:50,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 121 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:02:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-02-17 03:02:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 381. [2023-02-17 03:02:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.0904255319148937) internal successors, (410), 380 states have internal predecessors, (410), 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) [2023-02-17 03:02:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 410 transitions. [2023-02-17 03:02:50,488 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 410 transitions. Word has length 121 [2023-02-17 03:02:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:50,488 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 410 transitions. [2023-02-17 03:02:50,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 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) [2023-02-17 03:02:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 410 transitions. [2023-02-17 03:02:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-17 03:02:50,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:50,490 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2023-02-17 03:02:50,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:50,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-17 03:02:50,701 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:50,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1920952833, now seen corresponding path program 3 times [2023-02-17 03:02:50,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:50,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677903163] [2023-02-17 03:02:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 358 proven. 540 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-17 03:02:51,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677903163] [2023-02-17 03:02:51,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677903163] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184440887] [2023-02-17 03:02:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:51,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:51,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:51,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 03:02:51,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 03:02:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 03:02:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:51,115 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 [2023-02-17 03:02:51,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:51,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-17 03:02:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 10 proven. 413 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-17 03:02:51,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-17 03:02:51,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184440887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:51,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:51,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-02-17 03:02:51,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151535478] [2023-02-17 03:02:51,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:51,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:02:51,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:51,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:02:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:02:51,577 INFO L87 Difference]: Start difference. First operand 381 states and 410 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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) [2023-02-17 03:02:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:53,075 INFO L93 Difference]: Finished difference Result 380 states and 401 transitions. [2023-02-17 03:02:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-17 03:02:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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 130 [2023-02-17 03:02:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:53,077 INFO L225 Difference]: With dead ends: 380 [2023-02-17 03:02:53,077 INFO L226 Difference]: Without dead ends: 380 [2023-02-17 03:02:53,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=4976, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 03:02:53,080 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 217 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:53,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:02:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-17 03:02:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-02-17 03:02:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 376 states have (on average 1.0664893617021276) internal successors, (401), 379 states have internal predecessors, (401), 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) [2023-02-17 03:02:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 401 transitions. [2023-02-17 03:02:53,087 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 401 transitions. Word has length 130 [2023-02-17 03:02:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:53,087 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 401 transitions. [2023-02-17 03:02:53,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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) [2023-02-17 03:02:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 401 transitions. [2023-02-17 03:02:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-17 03:02:53,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:53,089 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-17 03:02:53,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:53,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:53,295 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1097568675, now seen corresponding path program 3 times [2023-02-17 03:02:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:53,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731121889] [2023-02-17 03:02:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-17 03:02:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731121889] [2023-02-17 03:02:53,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731121889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:53,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459484877] [2023-02-17 03:02:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:53,509 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:53,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 03:02:53,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 03:02:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 03:02:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:53,628 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 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-17 03:02:53,632 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 [2023-02-17 03:02:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2023-02-17 03:02:53,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:02:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459484877] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:02:53,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:02:53,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-02-17 03:02:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725100488] [2023-02-17 03:02:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:02:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 03:02:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 03:02:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:02:53,698 INFO L87 Difference]: Start difference. First operand 380 states and 401 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:53,734 INFO L93 Difference]: Finished difference Result 379 states and 398 transitions. [2023-02-17 03:02:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:02:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-02-17 03:02:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:53,737 INFO L225 Difference]: With dead ends: 379 [2023-02-17 03:02:53,737 INFO L226 Difference]: Without dead ends: 379 [2023-02-17 03:02:53,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:02:53,741 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:53,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 35 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:02:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-17 03:02:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-02-17 03:02:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 376 states have (on average 1.0585106382978724) internal successors, (398), 378 states have internal predecessors, (398), 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) [2023-02-17 03:02:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 398 transitions. [2023-02-17 03:02:53,748 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 398 transitions. Word has length 149 [2023-02-17 03:02:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:53,748 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 398 transitions. [2023-02-17 03:02:53,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 398 transitions. [2023-02-17 03:02:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-17 03:02:53,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:53,750 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:53,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:53,958 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1797778537, now seen corresponding path program 1 times [2023-02-17 03:02:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:53,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508697379] [2023-02-17 03:02:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-02-17 03:02:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508697379] [2023-02-17 03:02:54,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508697379] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203993433] [2023-02-17 03:02:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:54,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:54,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:54,185 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:54,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 03:02:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:54,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 03:02:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-17 03:02:54,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 21 proven. 990 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-02-17 03:02:54,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203993433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:54,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:54,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 14] total 32 [2023-02-17 03:02:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159243761] [2023-02-17 03:02:54,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 03:02:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 03:02:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2023-02-17 03:02:54,729 INFO L87 Difference]: Start difference. First operand 379 states and 398 transitions. Second operand has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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) [2023-02-17 03:02:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:55,694 INFO L93 Difference]: Finished difference Result 596 states and 627 transitions. [2023-02-17 03:02:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 03:02:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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 162 [2023-02-17 03:02:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:55,696 INFO L225 Difference]: With dead ends: 596 [2023-02-17 03:02:55,696 INFO L226 Difference]: Without dead ends: 596 [2023-02-17 03:02:55,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 293 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=908, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 03:02:55,698 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 321 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:55,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 455 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 03:02:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-02-17 03:02:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2023-02-17 03:02:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0681431005110733) internal successors, (627), 589 states have internal predecessors, (627), 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) [2023-02-17 03:02:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 627 transitions. [2023-02-17 03:02:55,706 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 627 transitions. Word has length 162 [2023-02-17 03:02:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:55,707 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 627 transitions. [2023-02-17 03:02:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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) [2023-02-17 03:02:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 627 transitions. [2023-02-17 03:02:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-02-17 03:02:55,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:55,710 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-17 03:02:55,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:55,918 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2023-02-17 03:02:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:55,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651115314] [2023-02-17 03:02:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:55,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3996 proven. 877 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2023-02-17 03:02:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:56,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651115314] [2023-02-17 03:02:56,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651115314] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621858068] [2023-02-17 03:02:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 03:02:56,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:56,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:56,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 03:02:56,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 03:02:56,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 03:02:57,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-17 03:02:57,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-17 03:02:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621858068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:57,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 35 [2023-02-17 03:02:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041450094] [2023-02-17 03:02:57,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 03:02:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 03:02:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 03:02:57,376 INFO L87 Difference]: Start difference. First operand 590 states and 627 transitions. Second operand has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 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) [2023-02-17 03:02:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:58,297 INFO L93 Difference]: Finished difference Result 590 states and 620 transitions. [2023-02-17 03:02:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-17 03:02:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 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 301 [2023-02-17 03:02:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:58,300 INFO L225 Difference]: With dead ends: 590 [2023-02-17 03:02:58,300 INFO L226 Difference]: Without dead ends: 590 [2023-02-17 03:02:58,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 574 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1013, Invalid=3679, Unknown=0, NotChecked=0, Total=4692 [2023-02-17 03:02:58,302 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:58,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 106 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:02:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-17 03:02:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-17 03:02:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0562180579216354) internal successors, (620), 589 states have internal predecessors, (620), 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) [2023-02-17 03:02:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 620 transitions. [2023-02-17 03:02:58,311 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 620 transitions. Word has length 301 [2023-02-17 03:02:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:58,311 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 620 transitions. [2023-02-17 03:02:58,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 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) [2023-02-17 03:02:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 620 transitions. [2023-02-17 03:02:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-17 03:02:58,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:58,315 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-17 03:02:58,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:58,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 03:02:58,522 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:02:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2023-02-17 03:02:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44871095] [2023-02-17 03:02:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4729 proven. 1323 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2023-02-17 03:02:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44871095] [2023-02-17 03:02:59,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44871095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032216585] [2023-02-17 03:02:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 03:02:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:59,171 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:59,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 03:03:01,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-17 03:03:01,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:03:01,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-17 03:03:01,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-17 03:03:01,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032216585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:01,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:01,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 36 [2023-02-17 03:03:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111323444] [2023-02-17 03:03:01,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:01,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 03:03:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 03:03:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 03:03:01,951 INFO L87 Difference]: Start difference. First operand 590 states and 620 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 36 states have internal predecessors, (236), 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) [2023-02-17 03:03:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:03,121 INFO L93 Difference]: Finished difference Result 590 states and 609 transitions. [2023-02-17 03:03:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-17 03:03:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 36 states have internal predecessors, (236), 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 316 [2023-02-17 03:03:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:03,123 INFO L225 Difference]: With dead ends: 590 [2023-02-17 03:03:03,124 INFO L226 Difference]: Without dead ends: 590 [2023-02-17 03:03:03,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 601 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1772, Invalid=5034, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 03:03:03,126 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 118 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:03,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 308 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:03:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-17 03:03:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-17 03:03:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0374787052810903) internal successors, (609), 589 states have internal predecessors, (609), 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) [2023-02-17 03:03:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 609 transitions. [2023-02-17 03:03:03,137 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 609 transitions. Word has length 316 [2023-02-17 03:03:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:03,138 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 609 transitions. [2023-02-17 03:03:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 36 states have internal predecessors, (236), 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) [2023-02-17 03:03:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 609 transitions. [2023-02-17 03:03:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-02-17 03:03:03,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:03,142 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-17 03:03:03,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 03:03:03,351 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2023-02-17 03:03:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721761875] [2023-02-17 03:03:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 243 proven. 7020 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-17 03:03:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721761875] [2023-02-17 03:03:04,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721761875] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:04,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576089897] [2023-02-17 03:03:04,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 03:03:04,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:04,187 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:04,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 03:03:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:03:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-17 03:03:04,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-17 03:03:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576089897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:04,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:04,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2023-02-17 03:03:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127591540] [2023-02-17 03:03:04,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:04,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 03:03:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 03:03:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 03:03:04,841 INFO L87 Difference]: Start difference. First operand 590 states and 609 transitions. Second operand has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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) [2023-02-17 03:03:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:06,083 INFO L93 Difference]: Finished difference Result 574 states and 586 transitions. [2023-02-17 03:03:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-17 03:03:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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 331 [2023-02-17 03:03:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:06,086 INFO L225 Difference]: With dead ends: 574 [2023-02-17 03:03:06,086 INFO L226 Difference]: Without dead ends: 574 [2023-02-17 03:03:06,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 622 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2797, Invalid=10543, Unknown=0, NotChecked=0, Total=13340 [2023-02-17 03:03:06,090 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 499 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:06,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 170 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:03:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-17 03:03:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-17 03:03:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0265486725663717) internal successors, (580), 567 states have internal predecessors, (580), 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) [2023-02-17 03:03:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 580 transitions. [2023-02-17 03:03:06,111 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 580 transitions. Word has length 331 [2023-02-17 03:03:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:06,111 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 580 transitions. [2023-02-17 03:03:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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) [2023-02-17 03:03:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 580 transitions. [2023-02-17 03:03:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-02-17 03:03:06,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:06,114 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 03:03:06,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:06,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 03:03:06,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 223876524, now seen corresponding path program 8 times [2023-02-17 03:03:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681355337] [2023-02-17 03:03:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7237 proven. 2602 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-17 03:03:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681355337] [2023-02-17 03:03:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681355337] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:07,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036528630] [2023-02-17 03:03:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:03:07,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:07,233 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:07,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 03:03:07,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:03:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 03:03:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-17 03:03:07,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-17 03:03:07,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036528630] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:07,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:07,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2023-02-17 03:03:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188344178] [2023-02-17 03:03:08,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 03:03:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 03:03:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1340, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 03:03:08,003 INFO L87 Difference]: Start difference. First operand 568 states and 580 transitions. Second operand has 42 states, 42 states have (on average 6.285714285714286) internal successors, (264), 42 states have internal predecessors, (264), 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) [2023-02-17 03:03:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:09,303 INFO L93 Difference]: Finished difference Result 574 states and 582 transitions. [2023-02-17 03:03:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-17 03:03:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.285714285714286) internal successors, (264), 42 states have internal predecessors, (264), 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 383 [2023-02-17 03:03:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:09,306 INFO L225 Difference]: With dead ends: 574 [2023-02-17 03:03:09,306 INFO L226 Difference]: Without dead ends: 574 [2023-02-17 03:03:09,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 729 SyntacticMatches, 16 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2301, Invalid=6819, Unknown=0, NotChecked=0, Total=9120 [2023-02-17 03:03:09,307 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 118 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:09,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 224 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:03:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-17 03:03:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-17 03:03:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0194690265486726) internal successors, (576), 567 states have internal predecessors, (576), 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) [2023-02-17 03:03:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 576 transitions. [2023-02-17 03:03:09,314 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 576 transitions. Word has length 383 [2023-02-17 03:03:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 576 transitions. [2023-02-17 03:03:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.285714285714286) internal successors, (264), 42 states have internal predecessors, (264), 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) [2023-02-17 03:03:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 576 transitions. [2023-02-17 03:03:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-02-17 03:03:09,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:09,317 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 03:03:09,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:09,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:09,525 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 9 times [2023-02-17 03:03:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167799948] [2023-02-17 03:03:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167799948] [2023-02-17 03:03:10,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167799948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085151361] [2023-02-17 03:03:10,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:03:10,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:10,106 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:10,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 03:03:10,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-17 03:03:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:03:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:10,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085151361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:10,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:10,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-02-17 03:03:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188922661] [2023-02-17 03:03:10,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:10,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 03:03:10,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 03:03:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-17 03:03:10,834 INFO L87 Difference]: Start difference. First operand 568 states and 576 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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) [2023-02-17 03:03:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:12,904 INFO L93 Difference]: Finished difference Result 1608 states and 1686 transitions. [2023-02-17 03:03:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 03:03:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 388 [2023-02-17 03:03:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:12,909 INFO L225 Difference]: With dead ends: 1608 [2023-02-17 03:03:12,909 INFO L226 Difference]: Without dead ends: 1608 [2023-02-17 03:03:12,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 763 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 03:03:12,910 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1549 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:12,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 697 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 03:03:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2023-02-17 03:03:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 745. [2023-02-17 03:03:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 742 states have (on average 1.1078167115902966) internal successors, (822), 744 states have internal predecessors, (822), 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) [2023-02-17 03:03:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 822 transitions. [2023-02-17 03:03:12,927 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 822 transitions. Word has length 388 [2023-02-17 03:03:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:12,927 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 822 transitions. [2023-02-17 03:03:12,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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) [2023-02-17 03:03:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 822 transitions. [2023-02-17 03:03:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-17 03:03:12,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:12,929 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 03:03:12,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:13,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:13,137 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2023-02-17 03:03:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591191222] [2023-02-17 03:03:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:14,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591191222] [2023-02-17 03:03:14,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591191222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762707323] [2023-02-17 03:03:14,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:03:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:14,062 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:14,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 03:03:14,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:03:14,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 03:03:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:14,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:03:14,410 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 03:03:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:14,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-17 03:03:15,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762707323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:15,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:15,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-02-17 03:03:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297633638] [2023-02-17 03:03:15,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-17 03:03:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-17 03:03:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 03:03:15,123 INFO L87 Difference]: Start difference. First operand 745 states and 822 transitions. Second operand has 38 states, 37 states have (on average 5.45945945945946) internal successors, (202), 38 states have internal predecessors, (202), 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) [2023-02-17 03:03:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:16,692 INFO L93 Difference]: Finished difference Result 1600 states and 1656 transitions. [2023-02-17 03:03:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 03:03:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 5.45945945945946) internal successors, (202), 38 states have internal predecessors, (202), 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 389 [2023-02-17 03:03:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:16,696 INFO L225 Difference]: With dead ends: 1600 [2023-02-17 03:03:16,696 INFO L226 Difference]: Without dead ends: 1600 [2023-02-17 03:03:16,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2023-02-17 03:03:16,697 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1577 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:16,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 602 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:03:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2023-02-17 03:03:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 748. [2023-02-17 03:03:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 745 states have (on average 1.0630872483221476) internal successors, (792), 747 states have internal predecessors, (792), 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) [2023-02-17 03:03:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 792 transitions. [2023-02-17 03:03:16,726 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 792 transitions. Word has length 389 [2023-02-17 03:03:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:16,726 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 792 transitions. [2023-02-17 03:03:16,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 5.45945945945946) internal successors, (202), 38 states have internal predecessors, (202), 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) [2023-02-17 03:03:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 792 transitions. [2023-02-17 03:03:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-02-17 03:03:16,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:16,729 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 03:03:16,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-17 03:03:16,938 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 10 times [2023-02-17 03:03:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346250146] [2023-02-17 03:03:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1147 proven. 13330 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 03:03:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346250146] [2023-02-17 03:03:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346250146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933729029] [2023-02-17 03:03:18,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:03:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:18,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:18,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 03:03:19,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:03:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 03:03:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 03:03:19,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 03:03:20,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933729029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:20,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 81 [2023-02-17 03:03:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542038766] [2023-02-17 03:03:20,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-17 03:03:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-17 03:03:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1725, Invalid=4755, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 03:03:20,557 INFO L87 Difference]: Start difference. First operand 748 states and 792 transitions. Second operand has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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) [2023-02-17 03:03:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:28,018 INFO L93 Difference]: Finished difference Result 1561 states and 1666 transitions. [2023-02-17 03:03:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2023-02-17 03:03:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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 448 [2023-02-17 03:03:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:28,024 INFO L225 Difference]: With dead ends: 1561 [2023-02-17 03:03:28,025 INFO L226 Difference]: Without dead ends: 1561 [2023-02-17 03:03:28,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 830 SyntacticMatches, 20 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70160 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=37124, Invalid=94282, Unknown=0, NotChecked=0, Total=131406 [2023-02-17 03:03:28,038 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1595 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:28,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 273 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2765 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 03:03:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-02-17 03:03:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1511. [2023-02-17 03:03:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1508 states have (on average 1.0669761273209548) internal successors, (1609), 1510 states have internal predecessors, (1609), 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) [2023-02-17 03:03:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1609 transitions. [2023-02-17 03:03:28,066 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1609 transitions. Word has length 448 [2023-02-17 03:03:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:28,067 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 1609 transitions. [2023-02-17 03:03:28,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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) [2023-02-17 03:03:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1609 transitions. [2023-02-17 03:03:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-02-17 03:03:28,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:28,071 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:03:28,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-17 03:03:28,282 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1728592905, now seen corresponding path program 2 times [2023-02-17 03:03:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:28,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50397925] [2023-02-17 03:03:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 13559 proven. 3465 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2023-02-17 03:03:29,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50397925] [2023-02-17 03:03:29,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50397925] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461708671] [2023-02-17 03:03:29,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:03:29,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:29,603 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:29,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 03:03:29,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 03:03:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:03:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:30,250 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2169 Int) (v_ArrVal_2171 Int) (v_ArrVal_2170 Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2169) |v_ULTIMATE.start_main_~#mask~0#1.base_28|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2171) |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2170) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0))) is different from true [2023-02-17 03:03:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19188 trivial. 0 not checked. [2023-02-17 03:03:30,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:03:30,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461708671] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:03:30,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:03:30,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [23] total 25 [2023-02-17 03:03:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123990866] [2023-02-17 03:03:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:03:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:03:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:03:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=408, Unknown=1, NotChecked=44, Total=600 [2023-02-17 03:03:30,260 INFO L87 Difference]: Start difference. First operand 1511 states and 1609 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:03:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:30,269 INFO L93 Difference]: Finished difference Result 1510 states and 1608 transitions. [2023-02-17 03:03:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:03:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2023-02-17 03:03:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:30,274 INFO L225 Difference]: With dead ends: 1510 [2023-02-17 03:03:30,274 INFO L226 Difference]: Without dead ends: 1458 [2023-02-17 03:03:30,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=408, Unknown=1, NotChecked=44, Total=600 [2023-02-17 03:03:30,275 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:30,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2023-02-17 03:03:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-17 03:03:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-17 03:03:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0625) internal successors, (1547), 1457 states have internal predecessors, (1547), 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) [2023-02-17 03:03:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1547 transitions. [2023-02-17 03:03:30,295 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1547 transitions. Word has length 559 [2023-02-17 03:03:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:30,295 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1547 transitions. [2023-02-17 03:03:30,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:03:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1547 transitions. [2023-02-17 03:03:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2023-02-17 03:03:30,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:30,305 INFO L195 NwaCegarLoop]: trace histogram [187, 186, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-17 03:03:30,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:30,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:30,511 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1348735048, now seen corresponding path program 11 times [2023-02-17 03:03:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:30,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102268113] [2023-02-17 03:03:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48389 proven. 3465 refuted. 0 times theorem prover too weak. 39633 trivial. 0 not checked. [2023-02-17 03:03:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102268113] [2023-02-17 03:03:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102268113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080072015] [2023-02-17 03:03:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 03:03:32,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:32,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:32,937 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:32,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 03:03:40,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-17 03:03:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 03:03:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48255 proven. 3482 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-17 03:03:40,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 49141 proven. 2596 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-17 03:03:41,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080072015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:41,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:41,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 55 [2023-02-17 03:03:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345156892] [2023-02-17 03:03:41,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-17 03:03:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:41,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-17 03:03:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2434, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 03:03:41,035 INFO L87 Difference]: Start difference. First operand 1458 states and 1547 transitions. Second operand has 55 states, 55 states have (on average 6.109090909090909) internal successors, (336), 55 states have internal predecessors, (336), 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) [2023-02-17 03:03:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:03:43,648 INFO L93 Difference]: Finished difference Result 1458 states and 1535 transitions. [2023-02-17 03:03:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-17 03:03:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 6.109090909090909) internal successors, (336), 55 states have internal predecessors, (336), 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 1075 [2023-02-17 03:03:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:03:43,652 INFO L225 Difference]: With dead ends: 1458 [2023-02-17 03:03:43,652 INFO L226 Difference]: Without dead ends: 1458 [2023-02-17 03:03:43,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2105 SyntacticMatches, 14 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3851 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3669, Invalid=13887, Unknown=0, NotChecked=0, Total=17556 [2023-02-17 03:03:43,655 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:03:43,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 223 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 03:03:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-17 03:03:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-17 03:03:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0542582417582418) internal successors, (1535), 1457 states have internal predecessors, (1535), 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) [2023-02-17 03:03:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1535 transitions. [2023-02-17 03:03:43,674 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1535 transitions. Word has length 1075 [2023-02-17 03:03:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:03:43,674 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1535 transitions. [2023-02-17 03:03:43,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 6.109090909090909) internal successors, (336), 55 states have internal predecessors, (336), 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) [2023-02-17 03:03:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1535 transitions. [2023-02-17 03:03:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2023-02-17 03:03:43,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:03:43,684 INFO L195 NwaCegarLoop]: trace histogram [198, 197, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-17 03:03:43,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 03:03:43,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:43,897 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:03:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:03:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash 502793343, now seen corresponding path program 12 times [2023-02-17 03:03:43,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:03:43,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344369733] [2023-02-17 03:03:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:03:43,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:03:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:03:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 58626 proven. 4497 refuted. 0 times theorem prover too weak. 39111 trivial. 0 not checked. [2023-02-17 03:03:46,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:03:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344369733] [2023-02-17 03:03:46,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344369733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:03:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381807270] [2023-02-17 03:03:46,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 03:03:46,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:03:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:03:46,321 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:03:46,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 03:03:47,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-02-17 03:03:47,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:03:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 03:03:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:03:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 9530 proven. 20532 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-17 03:03:47,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:03:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 0 proven. 30062 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-17 03:03:49,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381807270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:03:49,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:03:49,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 65 [2023-02-17 03:03:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008428607] [2023-02-17 03:03:49,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:03:49,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-17 03:03:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:03:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-17 03:03:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2023-02-17 03:03:49,312 INFO L87 Difference]: Start difference. First operand 1458 states and 1535 transitions. Second operand has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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) [2023-02-17 03:04:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:01,909 INFO L93 Difference]: Finished difference Result 1663 states and 1744 transitions. [2023-02-17 03:04:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2023-02-17 03:04:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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 1130 [2023-02-17 03:04:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:01,912 INFO L225 Difference]: With dead ends: 1663 [2023-02-17 03:04:01,912 INFO L226 Difference]: Without dead ends: 1663 [2023-02-17 03:04:01,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2526 GetRequests, 2219 SyntacticMatches, 1 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34227 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=18563, Invalid=75993, Unknown=0, NotChecked=0, Total=94556 [2023-02-17 03:04:01,916 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1872 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:01,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 242 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 03:04:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-02-17 03:04:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1593. [2023-02-17 03:04:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1591 states have (on average 1.0546825895663106) internal successors, (1678), 1592 states have internal predecessors, (1678), 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) [2023-02-17 03:04:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1678 transitions. [2023-02-17 03:04:01,937 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1678 transitions. Word has length 1130 [2023-02-17 03:04:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:01,938 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 1678 transitions. [2023-02-17 03:04:01,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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) [2023-02-17 03:04:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1678 transitions. [2023-02-17 03:04:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2023-02-17 03:04:01,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:01,948 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 207, 207, 207, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-17 03:04:01,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:02,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:02,157 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:04:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2030221151, now seen corresponding path program 3 times [2023-02-17 03:04:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:02,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967175861] [2023-02-17 03:04:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 69451 proven. 5713 refuted. 0 times theorem prover too weak. 37572 trivial. 0 not checked. [2023-02-17 03:04:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967175861] [2023-02-17 03:04:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967175861] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967960199] [2023-02-17 03:04:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:04:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:04,809 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:04,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 03:04:05,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 03:04:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:04:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:04:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:05,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:04:05,109 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 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 03:04:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 108 proven. 21365 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-17 03:04:05,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 0 proven. 21473 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-17 03:04:08,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967960199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:08,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:08,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 37 [2023-02-17 03:04:08,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331900750] [2023-02-17 03:04:08,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-17 03:04:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-17 03:04:08,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 03:04:08,389 INFO L87 Difference]: Start difference. First operand 1593 states and 1678 transitions. Second operand has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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) [2023-02-17 03:04:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:13,041 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2023-02-17 03:04:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2023-02-17 03:04:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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 1181 [2023-02-17 03:04:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:13,044 INFO L225 Difference]: With dead ends: 1592 [2023-02-17 03:04:13,044 INFO L226 Difference]: Without dead ends: 1592 [2023-02-17 03:04:13,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2569 GetRequests, 2352 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14991 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12458, Invalid=35284, Unknown=0, NotChecked=0, Total=47742 [2023-02-17 03:04:13,047 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 157 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:13,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 222 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 03:04:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-17 03:04:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-17 03:04:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 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) [2023-02-17 03:04:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2023-02-17 03:04:13,065 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1181 [2023-02-17 03:04:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:13,066 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2023-02-17 03:04:13,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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) [2023-02-17 03:04:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2023-02-17 03:04:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1353 [2023-02-17 03:04:13,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:13,078 INFO L195 NwaCegarLoop]: trace histogram [241, 240, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 03:04:13,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:13,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-17 03:04:13,285 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:04:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 496562611, now seen corresponding path program 13 times [2023-02-17 03:04:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:13,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903881047] [2023-02-17 03:04:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93192 proven. 7128 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-17 03:04:16,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903881047] [2023-02-17 03:04:16,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903881047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705517049] [2023-02-17 03:04:16,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 03:04:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:16,797 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:16,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 03:04:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 4106 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 03:04:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-17 03:04:17,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-17 03:04:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705517049] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:18,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:18,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2023-02-17 03:04:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252693544] [2023-02-17 03:04:18,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:18,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-17 03:04:18,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-17 03:04:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=2604, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 03:04:18,439 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 58 states, 58 states have (on average 6.431034482758621) internal successors, (373), 58 states have internal predecessors, (373), 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) [2023-02-17 03:04:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:21,251 INFO L93 Difference]: Finished difference Result 1592 states and 1653 transitions. [2023-02-17 03:04:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-02-17 03:04:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.431034482758621) internal successors, (373), 58 states have internal predecessors, (373), 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 1352 [2023-02-17 03:04:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:21,256 INFO L225 Difference]: With dead ends: 1592 [2023-02-17 03:04:21,256 INFO L226 Difference]: Without dead ends: 1592 [2023-02-17 03:04:21,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2837 GetRequests, 2651 SyntacticMatches, 24 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6915, Invalid=19817, Unknown=0, NotChecked=0, Total=26732 [2023-02-17 03:04:21,261 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 94 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:21,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 519 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 03:04:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-17 03:04:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-17 03:04:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0389692017598995) internal successors, (1653), 1591 states have internal predecessors, (1653), 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) [2023-02-17 03:04:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1653 transitions. [2023-02-17 03:04:21,279 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1653 transitions. Word has length 1352 [2023-02-17 03:04:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:21,280 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1653 transitions. [2023-02-17 03:04:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.431034482758621) internal successors, (373), 58 states have internal predecessors, (373), 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) [2023-02-17 03:04:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1653 transitions. [2023-02-17 03:04:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2023-02-17 03:04:21,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:21,293 INFO L195 NwaCegarLoop]: trace histogram [249, 248, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 03:04:21,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-17 03:04:21,506 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:04:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2061280083, now seen corresponding path program 14 times [2023-02-17 03:04:21,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:21,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901563135] [2023-02-17 03:04:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 105929 proven. 8757 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-17 03:04:25,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901563135] [2023-02-17 03:04:25,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901563135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405882601] [2023-02-17 03:04:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:04:25,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:25,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:25,207 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:25,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 03:04:25,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:04:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:04:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 4218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 03:04:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-17 03:04:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-17 03:04:26,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405882601] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:26,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:26,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2023-02-17 03:04:26,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272900712] [2023-02-17 03:04:26,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-17 03:04:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-17 03:04:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=2985, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 03:04:26,890 INFO L87 Difference]: Start difference. First operand 1592 states and 1653 transitions. Second operand has 62 states, 62 states have (on average 6.451612903225806) internal successors, (400), 62 states have internal predecessors, (400), 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) [2023-02-17 03:04:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:30,136 INFO L93 Difference]: Finished difference Result 1592 states and 1644 transitions. [2023-02-17 03:04:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-02-17 03:04:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 6.451612903225806) internal successors, (400), 62 states have internal predecessors, (400), 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 1392 [2023-02-17 03:04:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:30,141 INFO L225 Difference]: With dead ends: 1592 [2023-02-17 03:04:30,141 INFO L226 Difference]: Without dead ends: 1592 [2023-02-17 03:04:30,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2935 GetRequests, 2727 SyntacticMatches, 26 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9490 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8762, Invalid=24910, Unknown=0, NotChecked=0, Total=33672 [2023-02-17 03:04:30,145 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 110 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:30,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 335 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 03:04:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-17 03:04:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-17 03:04:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0333123821495915) internal successors, (1644), 1591 states have internal predecessors, (1644), 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) [2023-02-17 03:04:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1644 transitions. [2023-02-17 03:04:30,162 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1644 transitions. Word has length 1392 [2023-02-17 03:04:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:30,162 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1644 transitions. [2023-02-17 03:04:30,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 6.451612903225806) internal successors, (400), 62 states have internal predecessors, (400), 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) [2023-02-17 03:04:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1644 transitions. [2023-02-17 03:04:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2023-02-17 03:04:30,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:30,176 INFO L195 NwaCegarLoop]: trace histogram [256, 255, 255, 255, 255, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 03:04:30,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:30,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-17 03:04:30,388 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:04:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1973398196, now seen corresponding path program 15 times [2023-02-17 03:04:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:30,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378989048] [2023-02-17 03:04:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 118353 proven. 10615 refuted. 0 times theorem prover too weak. 40334 trivial. 0 not checked. [2023-02-17 03:04:34,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:34,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378989048] [2023-02-17 03:04:34,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378989048] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:34,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199867216] [2023-02-17 03:04:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:04:34,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:34,163 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:34,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-17 03:04:35,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-17 03:04:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:04:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 03:04:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 0 proven. 27778 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-17 03:04:35,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 0 proven. 27778 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-17 03:04:41,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199867216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:41,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:41,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 83 [2023-02-17 03:04:41,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590821935] [2023-02-17 03:04:41,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:41,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-17 03:04:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-17 03:04:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=5538, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 03:04:41,619 INFO L87 Difference]: Start difference. First operand 1592 states and 1644 transitions. Second operand has 83 states, 83 states have (on average 6.168674698795181) internal successors, (512), 83 states have internal predecessors, (512), 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) [2023-02-17 03:04:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:47,319 INFO L93 Difference]: Finished difference Result 1878 states and 1937 transitions. [2023-02-17 03:04:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2023-02-17 03:04:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 6.168674698795181) internal successors, (512), 83 states have internal predecessors, (512), 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 1427 [2023-02-17 03:04:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:47,325 INFO L225 Difference]: With dead ends: 1878 [2023-02-17 03:04:47,325 INFO L226 Difference]: Without dead ends: 1878 [2023-02-17 03:04:47,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3077 GetRequests, 2804 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20879 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17097, Invalid=58253, Unknown=0, NotChecked=0, Total=75350 [2023-02-17 03:04:47,335 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1372 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:47,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 342 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 03:04:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2023-02-17 03:04:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1633. [2023-02-17 03:04:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 1.0318627450980393) internal successors, (1684), 1632 states have internal predecessors, (1684), 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) [2023-02-17 03:04:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 1684 transitions. [2023-02-17 03:04:47,353 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 1684 transitions. Word has length 1427 [2023-02-17 03:04:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:47,354 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 1684 transitions. [2023-02-17 03:04:47,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 6.168674698795181) internal successors, (512), 83 states have internal predecessors, (512), 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) [2023-02-17 03:04:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 1684 transitions. [2023-02-17 03:04:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1508 [2023-02-17 03:04:47,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:47,368 INFO L195 NwaCegarLoop]: trace histogram [272, 271, 271, 271, 271, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 03:04:47,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-17 03:04:47,577 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:04:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1509893028, now seen corresponding path program 16 times [2023-02-17 03:04:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:47,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31456135] [2023-02-17 03:04:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 190670 backedges. 137773 proven. 12717 refuted. 0 times theorem prover too weak. 40180 trivial. 0 not checked. [2023-02-17 03:04:51,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31456135] [2023-02-17 03:04:51,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31456135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368745022] [2023-02-17 03:04:51,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:04:51,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:51,749 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:51,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-17 03:05:16,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:05:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:05:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 4540 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 03:05:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:05:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 190670 backedges. 156453 proven. 15745 refuted. 0 times theorem prover too weak. 18472 trivial. 0 not checked. [2023-02-17 03:05:17,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:05:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 190670 backedges. 156453 proven. 15745 refuted. 0 times theorem prover too weak. 18472 trivial. 0 not checked. [2023-02-17 03:05:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368745022] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:05:18,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:05:18,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 38] total 76 [2023-02-17 03:05:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855357994] [2023-02-17 03:05:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:05:18,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-17 03:05:18,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:05:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-17 03:05:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=4538, Unknown=0, NotChecked=0, Total=5700 [2023-02-17 03:05:18,064 INFO L87 Difference]: Start difference. First operand 1633 states and 1684 transitions. Second operand has 76 states, 76 states have (on average 6.934210526315789) internal successors, (527), 76 states have internal predecessors, (527), 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) [2023-02-17 03:05:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:05:24,785 INFO L93 Difference]: Finished difference Result 1633 states and 1663 transitions. [2023-02-17 03:05:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2023-02-17 03:05:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 6.934210526315789) internal successors, (527), 76 states have internal predecessors, (527), 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 1507 [2023-02-17 03:05:24,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:05:24,791 INFO L225 Difference]: With dead ends: 1633 [2023-02-17 03:05:24,791 INFO L226 Difference]: Without dead ends: 1633 [2023-02-17 03:05:24,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3263 GetRequests, 2943 SyntacticMatches, 30 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26084 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=24115, Invalid=60857, Unknown=0, NotChecked=0, Total=84972 [2023-02-17 03:05:24,804 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 130 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 3475 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:05:24,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 553 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3475 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 03:05:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2023-02-17 03:05:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1633. [2023-02-17 03:05:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 1.0189950980392157) internal successors, (1663), 1632 states have internal predecessors, (1663), 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) [2023-02-17 03:05:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 1663 transitions. [2023-02-17 03:05:24,820 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 1663 transitions. Word has length 1507 [2023-02-17 03:05:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:05:24,820 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 1663 transitions. [2023-02-17 03:05:24,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 6.934210526315789) internal successors, (527), 76 states have internal predecessors, (527), 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) [2023-02-17 03:05:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 1663 transitions. [2023-02-17 03:05:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1573 [2023-02-17 03:05:24,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:05:24,835 INFO L195 NwaCegarLoop]: trace histogram [285, 284, 284, 284, 284, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 03:05:24,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-17 03:05:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:25,047 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 03:05:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:05:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -766025325, now seen corresponding path program 17 times [2023-02-17 03:05:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:05:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736684381] [2023-02-17 03:05:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:05:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:05:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 208974 backedges. 162924 proven. 17713 refuted. 0 times theorem prover too weak. 28337 trivial. 0 not checked. [2023-02-17 03:05:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:05:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736684381] [2023-02-17 03:05:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736684381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:05:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865814810] [2023-02-17 03:05:30,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 03:05:30,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:30,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:05:30,507 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:05:30,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process