./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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_-read.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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:28:53,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:28:53,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:28:53,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:28:53,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:28:53,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:28:53,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:28:53,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:28:53,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:28:53,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:28:53,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:28:53,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:28:53,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:28:53,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:28:53,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:28:53,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:28:53,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:28:53,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:28:53,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:28:53,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:28:53,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:28:53,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:28:53,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:28:53,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:28:53,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:28:53,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:28:53,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:28:53,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:28:53,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:28:53,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:28:53,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:28:53,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:28:53,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:28:53,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:28:53,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:28:53,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:28:53,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:28:53,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:28:53,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:28:53,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:28:53,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:28:53,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:28:53,544 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:28:53,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:28:53,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:28:53,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:28:53,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:28:53,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:28:53,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:28:53,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:28:53,548 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:28:53,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:28:53,549 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:28:53,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:28:53,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:28:53,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:28:53,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:28:53,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:28:53,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:28:53,551 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:28:53,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:28:53,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:28:53,552 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:28:53,552 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:28:53,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:28:53,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:28:53,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:28:53,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:28:53,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:28:53,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:28:53,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:28:53,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:28:53,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:28:53,554 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:28:53,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:28:53,554 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:28:53,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2023-02-17 08:28:53,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:28:53,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:28:53,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:28:53,841 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:28:53,841 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:28:53,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2023-02-17 08:28:54,975 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:28:55,177 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:28:55,179 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2023-02-17 08:28:55,183 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b691d2a64/9ac6eede468345638c5374d23ee412df/FLAGd999d1b02 [2023-02-17 08:28:55,194 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b691d2a64/9ac6eede468345638c5374d23ee412df [2023-02-17 08:28:55,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:28:55,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:28:55,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:28:55,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:28:55,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:28:55,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d659132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55, skipping insertion in model container [2023-02-17 08:28:55,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:28:55,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:28:55,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:28:55,340 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:28:55,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:28:55,367 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:28:55,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55 WrapperNode [2023-02-17 08:28:55,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:28:55,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:28:55,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:28:55,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:28:55,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,398 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-17 08:28:55,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:28:55,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:28:55,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:28:55,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:28:55,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,425 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:28:55,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:28:55,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:28:55,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:28:55,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (1/1) ... [2023-02-17 08:28:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:28:55,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:55,455 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 08:28:55,457 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 08:28:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:28:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:28:55,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:28:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 08:28:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 08:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:28:55,554 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:28:55,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:28:55,673 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:28:55,678 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:28:55,679 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 08:28:55,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:28:55 BoogieIcfgContainer [2023-02-17 08:28:55,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:28:55,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:28:55,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:28:55,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:28:55,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:28:55" (1/3) ... [2023-02-17 08:28:55,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6919d528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:28:55, skipping insertion in model container [2023-02-17 08:28:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:55" (2/3) ... [2023-02-17 08:28:55,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6919d528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:28:55, skipping insertion in model container [2023-02-17 08:28:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:28:55" (3/3) ... [2023-02-17 08:28:55,689 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2023-02-17 08:28:55,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:28:55,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 08:28:55,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:28:55,805 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;@6d15f98f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:28:55,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 08:28:55,810 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 08:28:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:28:55,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:55,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:28:55,818 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 08:28:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-17 08:28:55,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:55,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873892752] [2023-02-17 08:28:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:55,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,015 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 08:28:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873892752] [2023-02-17 08:28:56,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873892752] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:56,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:56,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:56,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867731715] [2023-02-17 08:28:56,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:56,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:56,057 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 08:28:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:56,127 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-17 08:28:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:56,131 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 08:28:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:56,144 INFO L225 Difference]: With dead ends: 59 [2023-02-17 08:28:56,145 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 08:28:56,146 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 08:28:56,149 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 08:28:56,150 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 08:28:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 08:28:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-17 08:28:56,169 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 08:28:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-17 08:28:56,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-17 08:28:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:56,171 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-17 08:28:56,172 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 08:28:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-17 08:28:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:28:56,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:56,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:28:56,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:28:56,173 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 08:28:56,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-17 08:28:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208871443] [2023-02-17 08:28:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,231 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 08:28:56,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208871443] [2023-02-17 08:28:56,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208871443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:56,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:56,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003816134] [2023-02-17 08:28:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:56,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:56,236 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 08:28:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:56,272 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-17 08:28:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:56,273 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 08:28:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:56,274 INFO L225 Difference]: With dead ends: 58 [2023-02-17 08:28:56,274 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 08:28:56,274 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 08:28:56,276 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:56,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 08:28:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-17 08:28:56,280 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 08:28:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 08:28:56,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-17 08:28:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:56,281 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 08:28:56,282 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 08:28:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 08:28:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:28:56,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:56,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:28:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:28:56,283 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 08:28:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-17 08:28:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140801728] [2023-02-17 08:28:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,386 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 08:28:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140801728] [2023-02-17 08:28:56,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140801728] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:56,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:56,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:56,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412811510] [2023-02-17 08:28:56,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:56,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:56,393 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 08:28:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:56,438 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-17 08:28:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:56,440 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 08:28:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:56,441 INFO L225 Difference]: With dead ends: 32 [2023-02-17 08:28:56,442 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 08:28:56,442 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 08:28:56,444 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 08:28:56,446 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 08:28:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 08:28:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 08:28:56,452 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 08:28:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-17 08:28:56,454 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-17 08:28:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:56,454 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-17 08:28:56,454 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 08:28:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-17 08:28:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:28:56,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:56,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:28:56,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:28:56,456 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 08:28:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-17 08:28:56,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:56,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629691776] [2023-02-17 08:28:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,554 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 08:28:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629691776] [2023-02-17 08:28:56,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629691776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:56,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:56,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839893126] [2023-02-17 08:28:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:56,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:56,558 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 08:28:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:56,613 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-17 08:28:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:28:56,613 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 08:28:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:56,614 INFO L225 Difference]: With dead ends: 55 [2023-02-17 08:28:56,614 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 08:28:56,615 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 08:28:56,616 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:56,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 08:28:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-17 08:28:56,620 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 08:28:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 08:28:56,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-17 08:28:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:56,621 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 08:28:56,621 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 08:28:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 08:28:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 08:28:56,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:56,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:56,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:28:56,623 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 08:28:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-17 08:28:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:56,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749795709] [2023-02-17 08:28:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,672 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 08:28:56,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749795709] [2023-02-17 08:28:56,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749795709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:56,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:56,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211579804] [2023-02-17 08:28:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:56,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:56,676 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 08:28:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:56,752 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-17 08:28:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:56,752 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 08:28:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:56,753 INFO L225 Difference]: With dead ends: 60 [2023-02-17 08:28:56,753 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 08:28:56,754 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 08:28:56,755 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 08:28:56,755 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 08:28:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 08:28:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2023-02-17 08:28:56,759 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 08:28:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-17 08:28:56,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2023-02-17 08:28:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:56,760 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-17 08:28:56,760 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 08:28:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-17 08:28:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 08:28:56,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:56,761 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:28:56,761 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 08:28:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-17 08:28:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878715414] [2023-02-17 08:28:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,869 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 08:28:56,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878715414] [2023-02-17 08:28:56,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878715414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760519373] [2023-02-17 08:28:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:56,875 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 08:28:56,896 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 08:28:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 08:28:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:56,973 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 08:28:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:57,013 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 08:28:57,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760519373] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:57,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:57,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-17 08:28:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835623371] [2023-02-17 08:28:57,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:57,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:28:57,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:28:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:28:57,022 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 08:28:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:57,112 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2023-02-17 08:28:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:57,117 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 08:28:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:57,123 INFO L225 Difference]: With dead ends: 130 [2023-02-17 08:28:57,123 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 08:28:57,126 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 08:28:57,130 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 164 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 08:28:57,131 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 08:28:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 08:28:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2023-02-17 08:28:57,144 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 08:28:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-02-17 08:28:57,146 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2023-02-17 08:28:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:57,146 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-02-17 08:28:57,147 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 08:28:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-02-17 08:28:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 08:28:57,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:57,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:57,164 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 08:28:57,357 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 08:28:57,358 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 08:28:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-17 08:28:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:57,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463037407] [2023-02-17 08:28:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:57,490 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 08:28:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463037407] [2023-02-17 08:28:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463037407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489003011] [2023-02-17 08:28:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:57,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:57,493 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 08:28:57,496 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 08:28:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 08:28:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:57,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:28:57,590 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 08:28:57,630 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 08:28:57,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:57,664 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 08:28:57,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489003011] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:57,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:57,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 08:28:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30028257] [2023-02-17 08:28:57,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:57,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:28:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:28:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:57,672 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 08:28:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:57,801 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2023-02-17 08:28:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:28:57,801 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 08:28:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:57,802 INFO L225 Difference]: With dead ends: 129 [2023-02-17 08:28:57,802 INFO L226 Difference]: Without dead ends: 129 [2023-02-17 08:28:57,803 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 08:28:57,803 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 08:28:57,804 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 08:28:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-17 08:28:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2023-02-17 08:28:57,808 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 08:28:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-17 08:28:57,808 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2023-02-17 08:28:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:57,809 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-17 08:28:57,809 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 08:28:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-17 08:28:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 08:28:57,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:57,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:57,819 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 08:28:58,016 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 08:28:58,017 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 08:28:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2023-02-17 08:28:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688262980] [2023-02-17 08:28:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,078 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 08:28:58,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:58,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688262980] [2023-02-17 08:28:58,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688262980] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595780445] [2023-02-17 08:28:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:58,080 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 08:28:58,084 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 08:28:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 08:28:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:58,145 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 08:28:58,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:58,172 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 08:28:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595780445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:58,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:58,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-17 08:28:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384413560] [2023-02-17 08:28:58,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:28:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:28:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:28:58,175 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 08:28:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:58,284 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2023-02-17 08:28:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:28:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 08:28:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:58,286 INFO L225 Difference]: With dead ends: 88 [2023-02-17 08:28:58,286 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 08:28:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:28:58,287 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 62 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 08:28:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2023-02-17 08:28:58,290 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 08:28:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-17 08:28:58,290 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2023-02-17 08:28:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:58,291 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-17 08:28:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 08:28:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-17 08:28:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:58,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:58,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:58,300 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 08:28:58,497 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 08:28:58,498 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 08:28:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2023-02-17 08:28:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401215008] [2023-02-17 08:28:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,572 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 08:28:58,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:58,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401215008] [2023-02-17 08:28:58,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401215008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:58,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:58,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237237931] [2023-02-17 08:28:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:28:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:28:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:58,574 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 08:28:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:58,591 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-02-17 08:28:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:58,591 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 08:28:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:58,592 INFO L225 Difference]: With dead ends: 46 [2023-02-17 08:28:58,592 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 08:28:58,592 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 08:28:58,593 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:58,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 08:28:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-17 08:28:58,595 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 08:28:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-17 08:28:58,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2023-02-17 08:28:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:58,596 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-17 08:28:58,596 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 08:28:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-17 08:28:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:58,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:58,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:28:58,597 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 08:28:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2023-02-17 08:28:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619918913] [2023-02-17 08:28:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,662 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 08:28:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619918913] [2023-02-17 08:28:58,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619918913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:58,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:58,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187701783] [2023-02-17 08:28:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:58,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:58,664 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 08:28:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:58,686 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-17 08:28:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:58,687 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 08:28:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:58,687 INFO L225 Difference]: With dead ends: 76 [2023-02-17 08:28:58,687 INFO L226 Difference]: Without dead ends: 76 [2023-02-17 08:28:58,688 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 08:28:58,688 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:58,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-17 08:28:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-17 08:28:58,691 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 08:28:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-17 08:28:58,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-17 08:28:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:58,692 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-17 08:28:58,692 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 08:28:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-17 08:28:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 08:28:58,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:58,693 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 08:28:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:28:58,694 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 08:28:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-17 08:28:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:58,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411869292] [2023-02-17 08:28:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,748 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 08:28:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:58,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411869292] [2023-02-17 08:28:58,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411869292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084982966] [2023-02-17 08:28:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:58,750 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 08:28:58,778 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 08:28:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 08:28:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:58,839 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 08:28:58,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:58,861 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 08:28:58,875 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 08:28:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084982966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:58,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:58,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 08:28:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005827984] [2023-02-17 08:28:58,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:28:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:28:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:58,878 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 08:28:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:58,930 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-17 08:28:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:28:58,930 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 08:28:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:58,931 INFO L225 Difference]: With dead ends: 80 [2023-02-17 08:28:58,931 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 08:28:58,932 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 08:28:58,932 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:58,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 08:28:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-17 08:28:58,937 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 08:28:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-17 08:28:58,939 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-17 08:28:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:58,939 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-17 08:28:58,939 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 08:28:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-17 08:28:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 08:28:58,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:58,941 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-17 08:28:58,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 08:28:59,151 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 08:28:59,152 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 08:28:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-17 08:28:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362422725] [2023-02-17 08:28:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:59,241 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 08:28:59,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362422725] [2023-02-17 08:28:59,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362422725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962929346] [2023-02-17 08:28:59,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:28:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:59,243 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 08:28:59,245 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 08:28:59,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:28:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:28:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 08:28:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:59,346 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 08:28:59,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:28:59,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962929346] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:59,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:28:59,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-17 08:28:59,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234643066] [2023-02-17 08:28:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:59,350 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 08:28:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:59,413 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-17 08:28:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:28:59,414 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 08:28:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:59,415 INFO L225 Difference]: With dead ends: 86 [2023-02-17 08:28:59,415 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 08:28:59,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:28:59,416 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:59,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 08:28:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-17 08:28:59,423 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 08:28:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-17 08:28:59,424 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-17 08:28:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:59,425 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-17 08:28:59,425 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 08:28:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-17 08:28:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 08:28:59,428 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:59,428 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 08:28:59,437 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 08:28:59,634 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 08:28:59,635 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 08:28:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-17 08:28:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:59,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928393597] [2023-02-17 08:28:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:59,699 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 08:28:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:59,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928393597] [2023-02-17 08:28:59,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928393597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:59,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889249045] [2023-02-17 08:28:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:59,702 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 08:28:59,709 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 08:28:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:59,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 08:28:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:59,872 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_137 Int) (v_ArrVal_136 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_16| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_11| Int) (v_ArrVal_138 Int)) (and (= 0 (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| v_ArrVal_138) |v_ULTIMATE.start_main_~#mask~0#1.base_11|)) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| v_ArrVal_137) |v_ULTIMATE.start_main_~#mask~0#1.base_11| v_ArrVal_136) |v_ULTIMATE.start_main_~#b~0#1.base_16| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_11| 0)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16|)))) is different from true [2023-02-17 08:28:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 08:28:59,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:28:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889249045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:59,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:28:59,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-02-17 08:28:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564093271] [2023-02-17 08:28:59,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:59,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-02-17 08:28:59,877 INFO L87 Difference]: Start difference. First operand 61 states and 66 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 08:28:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:59,912 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2023-02-17 08:28:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:59,912 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 26 [2023-02-17 08:28:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:59,913 INFO L225 Difference]: With dead ends: 62 [2023-02-17 08:28:59,913 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 08:28:59,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-02-17 08:28:59,914 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 08:28:59,914 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 08:28:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 08:28:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-17 08:28:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 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 08:28:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-02-17 08:28:59,916 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2023-02-17 08:28:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:59,916 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-02-17 08:28:59,916 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 08:28:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-02-17 08:28:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 08:28:59,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:59,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:59,926 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 08:29:00,123 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 08:29:00,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2023-02-17 08:29:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615359514] [2023-02-17 08:29:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 08:29:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:00,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615359514] [2023-02-17 08:29:00,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615359514] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:00,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386409746] [2023-02-17 08:29:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:00,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:00,167 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 08:29:00,177 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 08:29:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 08:29:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:00,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 08:29:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:00,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:00,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-02-17 08:29:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:00,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:00,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-02-17 08:29:00,353 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 42 treesize of output 36 [2023-02-17 08:29:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:00,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386409746] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:00,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:00,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2023-02-17 08:29:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709637452] [2023-02-17 08:29:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 08:29:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 08:29:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:29:00,456 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 08:29:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:00,666 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2023-02-17 08:29:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:29:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 27 [2023-02-17 08:29:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:00,667 INFO L225 Difference]: With dead ends: 101 [2023-02-17 08:29:00,667 INFO L226 Difference]: Without dead ends: 101 [2023-02-17 08:29:00,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-02-17 08:29:00,668 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:00,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-17 08:29:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2023-02-17 08:29:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 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 08:29:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-02-17 08:29:00,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2023-02-17 08:29:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:00,671 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-02-17 08:29:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 08:29:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-02-17 08:29:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 08:29:00,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:00,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:00,680 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 08:29:00,877 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 08:29:00,877 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 08:29:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-17 08:29:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:00,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406292260] [2023-02-17 08:29:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:00,954 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 08:29:00,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406292260] [2023-02-17 08:29:00,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406292260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134075800] [2023-02-17 08:29:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:00,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:00,957 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 08:29:00,981 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 08:29:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 08:29:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:01,058 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 08:29:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:01,094 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 08:29:01,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134075800] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:01,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:01,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-17 08:29:01,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293637748] [2023-02-17 08:29:01,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:01,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:29:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:29:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:29:01,096 INFO L87 Difference]: Start difference. First operand 66 states and 70 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 08:29:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:01,247 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2023-02-17 08:29:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:29:01,248 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 08:29:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:01,248 INFO L225 Difference]: With dead ends: 66 [2023-02-17 08:29:01,248 INFO L226 Difference]: Without dead ends: 66 [2023-02-17 08:29:01,249 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 08:29:01,249 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:01,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-17 08:29:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-02-17 08:29:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 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 08:29:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-02-17 08:29:01,251 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2023-02-17 08:29:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:01,252 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-02-17 08:29:01,252 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 08:29:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-02-17 08:29:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 08:29:01,252 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:01,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:01,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:01,453 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 08:29:01,453 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:01,454 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-17 08:29:01,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:01,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108883921] [2023-02-17 08:29:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:01,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,572 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 08:29:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:01,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108883921] [2023-02-17 08:29:01,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108883921] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:01,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228891926] [2023-02-17 08:29:01,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:01,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:01,575 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 08:29:01,577 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 08:29:01,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:29:01,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:01,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 08:29:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:01,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:01,647 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 08:29:01,651 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 08:29:01,675 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 08:29:01,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:01,708 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 08:29:01,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228891926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:01,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:01,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-02-17 08:29:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091488780] [2023-02-17 08:29:01,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:01,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:29:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:29:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:29:01,711 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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 08:29:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:01,776 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2023-02-17 08:29:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:29:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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 08:29:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:01,778 INFO L225 Difference]: With dead ends: 158 [2023-02-17 08:29:01,778 INFO L226 Difference]: Without dead ends: 158 [2023-02-17 08:29:01,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:29:01,779 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:01,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 88 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-17 08:29:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2023-02-17 08:29:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 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 08:29:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2023-02-17 08:29:01,782 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2023-02-17 08:29:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:01,783 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2023-02-17 08:29:01,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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 08:29:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2023-02-17 08:29:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 08:29:01,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:01,783 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:01,791 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 08:29:01,989 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 08:29:01,990 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 08:29:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-17 08:29:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831352910] [2023-02-17 08:29:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:02,108 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 08:29:02,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831352910] [2023-02-17 08:29:02,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831352910] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229965166] [2023-02-17 08:29:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:02,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:02,111 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 08:29:02,121 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 08:29:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:29:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:02,224 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 08:29:02,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:02,252 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 08:29:02,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229965166] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:02,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:02,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-17 08:29:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246630881] [2023-02-17 08:29:02,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:02,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 08:29:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 08:29:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:29:02,255 INFO L87 Difference]: Start difference. First operand 150 states and 167 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 08:29:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:02,406 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2023-02-17 08:29:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 08:29:02,407 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 08:29:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:02,408 INFO L225 Difference]: With dead ends: 165 [2023-02-17 08:29:02,408 INFO L226 Difference]: Without dead ends: 165 [2023-02-17 08:29:02,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2023-02-17 08:29:02,409 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 97 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-17 08:29:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2023-02-17 08:29:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 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 08:29:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2023-02-17 08:29:02,412 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2023-02-17 08:29:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:02,413 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2023-02-17 08:29:02,413 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 08:29:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2023-02-17 08:29:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 08:29:02,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:02,413 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:02,420 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 08:29:02,619 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 08:29:02,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2023-02-17 08:29:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:02,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17988736] [2023-02-17 08:29:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 08:29:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17988736] [2023-02-17 08:29:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17988736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043618962] [2023-02-17 08:29:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:02,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:02,698 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 08:29:02,722 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 08:29:02,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:29:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:29:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 08:29:02,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:02,863 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 08:29:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 08:29:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043618962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:02,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-02-17 08:29:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822729074] [2023-02-17 08:29:02,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 08:29:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 08:29:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:29:02,896 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 08:29:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:03,009 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2023-02-17 08:29:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:29:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 49 [2023-02-17 08:29:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:03,010 INFO L225 Difference]: With dead ends: 153 [2023-02-17 08:29:03,010 INFO L226 Difference]: Without dead ends: 153 [2023-02-17 08:29:03,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-02-17 08:29:03,011 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 150 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:03,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-17 08:29:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2023-02-17 08:29:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 states have internal predecessors, (159), 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 08:29:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2023-02-17 08:29:03,014 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2023-02-17 08:29:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:03,014 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2023-02-17 08:29:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 08:29:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2023-02-17 08:29:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 08:29:03,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:03,015 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-17 08:29:03,025 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 08:29:03,225 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 08:29:03,226 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-17 08:29:03,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:03,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373225196] [2023-02-17 08:29:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:03,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:03,367 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 08:29:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373225196] [2023-02-17 08:29:03,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373225196] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551109228] [2023-02-17 08:29:03,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:03,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:03,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:03,369 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 08:29:03,371 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 08:29:03,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:29:03,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 08:29:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:03,507 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 08:29:03,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:03,573 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 08:29:03,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551109228] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:03,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:03,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-02-17 08:29:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688737433] [2023-02-17 08:29:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:29:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:29:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:29:03,577 INFO L87 Difference]: Start difference. First operand 147 states and 159 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 08:29:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:03,836 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2023-02-17 08:29:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 08:29:03,837 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 08:29:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:03,838 INFO L225 Difference]: With dead ends: 199 [2023-02-17 08:29:03,838 INFO L226 Difference]: Without dead ends: 199 [2023-02-17 08:29:03,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 08:29:03,839 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 286 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:03,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 104 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-17 08:29:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2023-02-17 08:29:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 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 08:29:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2023-02-17 08:29:03,843 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2023-02-17 08:29:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:03,843 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2023-02-17 08:29:03,844 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 08:29:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2023-02-17 08:29:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-17 08:29:03,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:03,844 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-17 08:29:03,850 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 08:29:04,050 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 08:29:04,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2023-02-17 08:29:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:04,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166940661] [2023-02-17 08:29:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 08:29:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166940661] [2023-02-17 08:29:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166940661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474943384] [2023-02-17 08:29:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:29:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:04,220 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 08:29:04,230 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 08:29:04,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 08:29:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 08:29:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:04,305 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 08:29:04,307 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 08:29:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 08:29:04,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:29:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474943384] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:04,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:29:04,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-02-17 08:29:04,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613268111] [2023-02-17 08:29:04,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:04,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:29:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:04,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:29:04,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:29:04,359 INFO L87 Difference]: Start difference. First operand 145 states and 154 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 08:29:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:04,396 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2023-02-17 08:29:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:29:04,396 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 75 [2023-02-17 08:29:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:04,397 INFO L225 Difference]: With dead ends: 143 [2023-02-17 08:29:04,397 INFO L226 Difference]: Without dead ends: 143 [2023-02-17 08:29:04,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:29:04,399 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:04,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 35 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:29:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-17 08:29:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2023-02-17 08:29:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 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 08:29:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-02-17 08:29:04,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2023-02-17 08:29:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:04,405 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-02-17 08:29:04,406 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 08:29:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-02-17 08:29:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 08:29:04,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:04,406 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:04,412 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 08:29:04,612 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 08:29:04,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:04,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2023-02-17 08:29:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:04,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791542613] [2023-02-17 08:29:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 08:29:04,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791542613] [2023-02-17 08:29:04,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791542613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331270411] [2023-02-17 08:29:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:04,760 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 08:29:04,783 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 08:29:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 08:29:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 08:29:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 08:29:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331270411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:04,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-17 08:29:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34804567] [2023-02-17 08:29:04,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:04,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 08:29:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 08:29:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-02-17 08:29:04,950 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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 08:29:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:05,196 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2023-02-17 08:29:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:29:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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 80 [2023-02-17 08:29:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:05,197 INFO L225 Difference]: With dead ends: 113 [2023-02-17 08:29:05,198 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 08:29:05,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:29:05,198 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:05,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 71 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 08:29:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2023-02-17 08:29:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 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 08:29:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2023-02-17 08:29:05,201 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2023-02-17 08:29:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:05,201 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2023-02-17 08:29:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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 08:29:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2023-02-17 08:29:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 08:29:05,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:05,202 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:29:05,208 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 08:29:05,408 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 08:29:05,408 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2023-02-17 08:29:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:05,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341288814] [2023-02-17 08:29:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-17 08:29:05,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341288814] [2023-02-17 08:29:05,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341288814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:05,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697867010] [2023-02-17 08:29:05,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:05,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:05,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:05,526 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 08:29:05,552 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 08:29:05,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 08:29:05,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 08:29:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:05,652 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_24| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_19| Int) (v_ArrVal_429 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_24| 1))) (and (= 0 (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_19|)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_24|)) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_19| v_ArrVal_429) |v_ULTIMATE.start_main_~#b~0#1.base_24| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_19| 0))))) is different from true [2023-02-17 08:29:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-17 08:29:05,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:29:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697867010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:05,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:29:05,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-02-17 08:29:05,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874050211] [2023-02-17 08:29:05,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:05,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:29:05,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:29:05,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2023-02-17 08:29:05,655 INFO L87 Difference]: Start difference. First operand 111 states and 113 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 08:29:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:05,664 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2023-02-17 08:29:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:29:05,666 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 85 [2023-02-17 08:29:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:05,667 INFO L225 Difference]: With dead ends: 110 [2023-02-17 08:29:05,667 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 08:29:05,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2023-02-17 08:29:05,667 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 08:29:05,668 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 08:29:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 08:29:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-17 08:29:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 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 08:29:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2023-02-17 08:29:05,670 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2023-02-17 08:29:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:05,670 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2023-02-17 08:29:05,670 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 08:29:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2023-02-17 08:29:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 08:29:05,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:05,671 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 08:29:05,682 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 08:29:05,877 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 08:29:05,878 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 08:29:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2023-02-17 08:29:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2978195] [2023-02-17 08:29:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:05,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 08:29:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2978195] [2023-02-17 08:29:06,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2978195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924053225] [2023-02-17 08:29:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:29:06,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:06,036 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 08:29:06,058 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 08:29:06,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 08:29:06,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 08:29:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:06,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:06,132 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 08:29:06,163 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 15 treesize of output 11 [2023-02-17 08:29:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-17 08:29:06,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-17 08:29:06,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924053225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:06,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:06,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-02-17 08:29:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664526351] [2023-02-17 08:29:06,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:06,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 08:29:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 08:29:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:29:06,510 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 15 states have internal predecessors, (85), 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 08:29:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:06,637 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2023-02-17 08:29:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:29:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 15 states have internal predecessors, (85), 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 91 [2023-02-17 08:29:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:06,638 INFO L225 Difference]: With dead ends: 117 [2023-02-17 08:29:06,639 INFO L226 Difference]: Without dead ends: 117 [2023-02-17 08:29:06,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2023-02-17 08:29:06,639 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 149 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:06,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 48 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-17 08:29:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2023-02-17 08:29:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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 08:29:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-17 08:29:06,642 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-02-17 08:29:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:06,642 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-17 08:29:06,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.071428571428571) internal successors, (85), 15 states have internal predecessors, (85), 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 08:29:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-17 08:29:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 08:29:06,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:06,643 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 08:29:06,655 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 08:29:06,849 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 08:29:06,849 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-17 08:29:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:06,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403237530] [2023-02-17 08:29:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:07,113 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 08:29:07,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403237530] [2023-02-17 08:29:07,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403237530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457563812] [2023-02-17 08:29:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:07,117 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 08:29:07,120 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 08:29:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 08:29:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:07,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:07,222 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 08:29:07,275 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 08:29:07,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:07,358 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 08:29:07,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457563812] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:07,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:07,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-17 08:29:07,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627164076] [2023-02-17 08:29:07,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 08:29:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 08:29:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-17 08:29:07,361 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 08:29:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:07,578 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2023-02-17 08:29:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:29:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 08:29:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:07,579 INFO L225 Difference]: With dead ends: 159 [2023-02-17 08:29:07,579 INFO L226 Difference]: Without dead ends: 159 [2023-02-17 08:29:07,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-02-17 08:29:07,580 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 68 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-17 08:29:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2023-02-17 08:29:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 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 08:29:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2023-02-17 08:29:07,583 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2023-02-17 08:29:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:07,583 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2023-02-17 08:29:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 08:29:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2023-02-17 08:29:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-17 08:29:07,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:07,584 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-17 08:29:07,593 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 08:29:07,784 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 08:29:07,784 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2023-02-17 08:29:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:07,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675130014] [2023-02-17 08:29:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 227 proven. 710 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-17 08:29:08,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675130014] [2023-02-17 08:29:08,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675130014] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474516388] [2023-02-17 08:29:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:08,113 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 08:29:08,116 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 08:29:08,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:29:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 08:29:08,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 453 proven. 424 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-02-17 08:29:08,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 453 proven. 424 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-02-17 08:29:08,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474516388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:08,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:08,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 25 [2023-02-17 08:29:08,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660974679] [2023-02-17 08:29:08,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:08,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 08:29:08,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 08:29:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-02-17 08:29:08,428 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 25 states, 25 states have (on average 5.72) internal successors, (143), 25 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 08:29:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:08,751 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2023-02-17 08:29:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 08:29:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.72) internal successors, (143), 25 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 122 [2023-02-17 08:29:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:08,753 INFO L225 Difference]: With dead ends: 167 [2023-02-17 08:29:08,753 INFO L226 Difference]: Without dead ends: 167 [2023-02-17 08:29:08,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 224 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 08:29:08,754 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:08,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 82 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-17 08:29:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2023-02-17 08:29:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 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 08:29:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2023-02-17 08:29:08,757 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2023-02-17 08:29:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:08,757 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2023-02-17 08:29:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.72) internal successors, (143), 25 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 08:29:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2023-02-17 08:29:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-17 08:29:08,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:08,758 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-02-17 08:29:08,771 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 08:29:08,966 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 08:29:08,966 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2023-02-17 08:29:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093045224] [2023-02-17 08:29:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:08,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 865 proven. 297 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-02-17 08:29:09,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:09,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093045224] [2023-02-17 08:29:09,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093045224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:09,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330494251] [2023-02-17 08:29:09,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:29:09,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:09,219 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 08:29:09,244 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 08:29:09,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 08:29:09,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 08:29:09,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 311 proven. 869 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-02-17 08:29:09,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 88 proven. 1092 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-02-17 08:29:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330494251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:09,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 40 [2023-02-17 08:29:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470434732] [2023-02-17 08:29:09,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 08:29:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 08:29:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 08:29:09,814 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 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 08:29:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:10,492 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2023-02-17 08:29:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 08:29:10,493 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 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 08:29:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:10,493 INFO L225 Difference]: With dead ends: 161 [2023-02-17 08:29:10,493 INFO L226 Difference]: Without dead ends: 161 [2023-02-17 08:29:10,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=987, Invalid=4125, Unknown=0, NotChecked=0, Total=5112 [2023-02-17 08:29:10,495 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 360 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:10,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 103 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:29:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-17 08:29:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2023-02-17 08:29:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 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 08:29:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2023-02-17 08:29:10,498 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2023-02-17 08:29:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:10,498 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2023-02-17 08:29:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 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 08:29:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2023-02-17 08:29:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-02-17 08:29:10,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:10,499 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-02-17 08:29:10,511 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 08:29:10,706 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 08:29:10,706 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2023-02-17 08:29:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765200338] [2023-02-17 08:29:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 237 proven. 1247 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-17 08:29:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765200338] [2023-02-17 08:29:11,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765200338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253136246] [2023-02-17 08:29:11,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:29:11,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:11,105 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 08:29:11,135 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 08:29:11,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:29:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 08:29:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-17 08:29:11,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-17 08:29:11,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253136246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:11,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:11,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2023-02-17 08:29:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441058777] [2023-02-17 08:29:11,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:11,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 08:29:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 08:29:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 08:29:11,640 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 39 states, 39 states have (on average 6.282051282051282) internal successors, (245), 39 states have internal predecessors, (245), 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 08:29:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:12,737 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2023-02-17 08:29:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-17 08:29:12,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.282051282051282) internal successors, (245), 39 states have internal predecessors, (245), 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 154 [2023-02-17 08:29:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:12,739 INFO L225 Difference]: With dead ends: 401 [2023-02-17 08:29:12,739 INFO L226 Difference]: Without dead ends: 401 [2023-02-17 08:29:12,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 276 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3095, Invalid=8461, Unknown=0, NotChecked=0, Total=11556 [2023-02-17 08:29:12,742 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 293 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:12,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 125 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:29:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-02-17 08:29:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2023-02-17 08:29:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 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 08:29:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2023-02-17 08:29:12,751 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2023-02-17 08:29:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:12,751 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2023-02-17 08:29:12,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.282051282051282) internal successors, (245), 39 states have internal predecessors, (245), 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 08:29:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2023-02-17 08:29:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-02-17 08:29:12,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:12,755 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:12,768 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 08:29:12,962 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 08:29:12,963 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2023-02-17 08:29:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:12,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137060196] [2023-02-17 08:29:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3878 proven. 218 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2023-02-17 08:29:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137060196] [2023-02-17 08:29:13,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137060196] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096147257] [2023-02-17 08:29:13,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 08:29:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:13,705 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 08:29:13,708 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 08:29:14,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-17 08:29:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:14,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 08:29:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2023-02-17 08:29:14,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3801 proven. 385 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2023-02-17 08:29:14,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096147257] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:14,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:14,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2023-02-17 08:29:14,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920070544] [2023-02-17 08:29:14,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:14,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 08:29:14,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 08:29:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 08:29:14,580 INFO L87 Difference]: Start difference. First operand 390 states and 411 transitions. Second operand has 36 states, 36 states have (on average 5.361111111111111) internal successors, (193), 36 states have internal predecessors, (193), 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 08:29:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:15,169 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2023-02-17 08:29:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 08:29:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.361111111111111) internal successors, (193), 36 states have internal predecessors, (193), 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 314 [2023-02-17 08:29:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:15,171 INFO L225 Difference]: With dead ends: 390 [2023-02-17 08:29:15,171 INFO L226 Difference]: Without dead ends: 390 [2023-02-17 08:29:15,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 603 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=777, Invalid=2883, Unknown=0, NotChecked=0, Total=3660 [2023-02-17 08:29:15,173 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:15,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 86 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:29:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-17 08:29:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-17 08:29:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 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 08:29:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2023-02-17 08:29:15,179 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2023-02-17 08:29:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:15,179 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2023-02-17 08:29:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.361111111111111) internal successors, (193), 36 states have internal predecessors, (193), 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 08:29:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2023-02-17 08:29:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-02-17 08:29:15,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:15,189 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:15,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-17 08:29:15,396 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 08:29:15,396 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2023-02-17 08:29:15,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215121803] [2023-02-17 08:29:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4649 proven. 311 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2023-02-17 08:29:16,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215121803] [2023-02-17 08:29:16,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215121803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768390040] [2023-02-17 08:29:16,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 08:29:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:16,202 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 08:29:16,205 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 08:29:17,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-17 08:29:17,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 08:29:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-02-17 08:29:17,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5128 proven. 667 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-02-17 08:29:18,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768390040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:18,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:18,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2023-02-17 08:29:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755105409] [2023-02-17 08:29:18,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 08:29:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 08:29:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 08:29:18,046 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 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 08:29:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:18,901 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2023-02-17 08:29:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 08:29:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 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 339 [2023-02-17 08:29:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:18,903 INFO L225 Difference]: With dead ends: 390 [2023-02-17 08:29:18,903 INFO L226 Difference]: Without dead ends: 390 [2023-02-17 08:29:18,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 649 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1138, Invalid=4412, Unknown=0, NotChecked=0, Total=5550 [2023-02-17 08:29:18,905 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:18,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 82 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:29:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-17 08:29:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-17 08:29:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 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 08:29:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2023-02-17 08:29:18,911 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2023-02-17 08:29:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:18,911 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2023-02-17 08:29:18,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 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 08:29:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2023-02-17 08:29:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2023-02-17 08:29:18,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:18,916 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:18,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-17 08:29:19,124 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 08:29:19,124 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2023-02-17 08:29:19,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:19,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283563164] [2023-02-17 08:29:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:19,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5360 proven. 419 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2023-02-17 08:29:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283563164] [2023-02-17 08:29:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283563164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243617233] [2023-02-17 08:29:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 08:29:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:20,002 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 08:29:20,005 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 08:29:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 08:29:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2023-02-17 08:29:20,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2023-02-17 08:29:20,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243617233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:20,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:20,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2023-02-17 08:29:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898144042] [2023-02-17 08:29:20,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 08:29:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 08:29:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 08:29:20,720 INFO L87 Difference]: Start difference. First operand 390 states and 400 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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 08:29:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:22,007 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2023-02-17 08:29:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-17 08:29:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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 359 [2023-02-17 08:29:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:22,009 INFO L225 Difference]: With dead ends: 390 [2023-02-17 08:29:22,009 INFO L226 Difference]: Without dead ends: 390 [2023-02-17 08:29:22,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 689 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 08:29:22,011 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 122 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:29:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-17 08:29:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-17 08:29:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 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 08:29:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2023-02-17 08:29:22,017 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2023-02-17 08:29:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:22,017 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2023-02-17 08:29:22,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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 08:29:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2023-02-17 08:29:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-02-17 08:29:22,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:22,019 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:22,029 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 08:29:22,220 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 08:29:22,220 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:22,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2023-02-17 08:29:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:22,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522285891] [2023-02-17 08:29:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5981 proven. 542 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2023-02-17 08:29:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522285891] [2023-02-17 08:29:23,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522285891] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984257463] [2023-02-17 08:29:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:29:23,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:23,137 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 08:29:23,152 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 08:29:23,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:29:23,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 08:29:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2023-02-17 08:29:23,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2023-02-17 08:29:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984257463] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:23,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:23,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2023-02-17 08:29:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209636609] [2023-02-17 08:29:23,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-17 08:29:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-17 08:29:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 08:29:24,002 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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 08:29:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:25,720 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2023-02-17 08:29:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-17 08:29:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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 374 [2023-02-17 08:29:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:25,721 INFO L225 Difference]: With dead ends: 390 [2023-02-17 08:29:25,721 INFO L226 Difference]: Without dead ends: 390 [2023-02-17 08:29:25,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 715 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2023-02-17 08:29:25,724 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:25,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 184 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 08:29:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-17 08:29:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-17 08:29:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 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 08:29:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2023-02-17 08:29:25,729 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2023-02-17 08:29:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:25,730 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2023-02-17 08:29:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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 08:29:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2023-02-17 08:29:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-02-17 08:29:25,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:25,732 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:25,740 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 08:29:25,939 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 08:29:25,940 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 08:29:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2023-02-17 08:29:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:25,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154779866] [2023-02-17 08:29:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7290 proven. 2602 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2023-02-17 08:29:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:26,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154779866] [2023-02-17 08:29:26,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154779866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657006466] [2023-02-17 08:29:26,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:29:26,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:26,762 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 08:29:26,765 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 08:29:27,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-17 08:29:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 08:29:27,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:27,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:27,227 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 08:29:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2023-02-17 08:29:27,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2023-02-17 08:29:27,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657006466] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:27,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2023-02-17 08:29:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49083748] [2023-02-17 08:29:27,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:27,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-17 08:29:27,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-17 08:29:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 08:29:27,935 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 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 08:29:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:30,007 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2023-02-17 08:29:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-17 08:29:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 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 384 [2023-02-17 08:29:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:30,010 INFO L225 Difference]: With dead ends: 522 [2023-02-17 08:29:30,010 INFO L226 Difference]: Without dead ends: 522 [2023-02-17 08:29:30,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4985 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4312, Invalid=15148, Unknown=0, NotChecked=0, Total=19460 [2023-02-17 08:29:30,013 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 883 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:30,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 210 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:29:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-02-17 08:29:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2023-02-17 08:29:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 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 08:29:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2023-02-17 08:29:30,024 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2023-02-17 08:29:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:30,025 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2023-02-17 08:29:30,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 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 08:29:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2023-02-17 08:29:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-02-17 08:29:30,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:30,028 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-17 08:29:30,039 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 08:29:30,234 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 08:29:30,234 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2023-02-17 08:29:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:30,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206386009] [2023-02-17 08:29:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:30,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1223 proven. 13330 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 08:29:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206386009] [2023-02-17 08:29:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206386009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309276907] [2023-02-17 08:29:31,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:29:31,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:31,842 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 08:29:31,844 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 08:29:32,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:29:32,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 08:29:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 08:29:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-17 08:29:33,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309276907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:33,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:33,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 81 [2023-02-17 08:29:33,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775738504] [2023-02-17 08:29:33,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-17 08:29:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-17 08:29:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1725, Invalid=4755, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 08:29:33,894 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 81 states, 81 states have (on average 6.419753086419753) internal successors, (520), 81 states have internal predecessors, (520), 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 08:29:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:40,989 INFO L93 Difference]: Finished difference Result 1468 states and 1557 transitions. [2023-02-17 08:29:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2023-02-17 08:29:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.419753086419753) internal successors, (520), 81 states have internal predecessors, (520), 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 449 [2023-02-17 08:29:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:40,994 INFO L225 Difference]: With dead ends: 1468 [2023-02-17 08:29:40,994 INFO L226 Difference]: Without dead ends: 1468 [2023-02-17 08:29:41,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 832 SyntacticMatches, 20 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65175 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=34482, Invalid=89070, Unknown=0, NotChecked=0, Total=123552 [2023-02-17 08:29:41,003 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 626 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:41,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 291 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 08:29:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2023-02-17 08:29:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1457. [2023-02-17 08:29:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0618131868131868) internal successors, (1546), 1456 states have internal predecessors, (1546), 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 08:29:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1546 transitions. [2023-02-17 08:29:41,020 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1546 transitions. Word has length 449 [2023-02-17 08:29:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:41,021 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1546 transitions. [2023-02-17 08:29:41,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.419753086419753) internal successors, (520), 81 states have internal predecessors, (520), 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 08:29:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1546 transitions. [2023-02-17 08:29:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2023-02-17 08:29:41,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:41,030 INFO L195 NwaCegarLoop]: trace histogram [187, 187, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-17 08:29:41,041 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 08:29:41,240 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 08:29:41,240 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1138886418, now seen corresponding path program 11 times [2023-02-17 08:29:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069806690] [2023-02-17 08:29:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 34458 proven. 833 refuted. 0 times theorem prover too weak. 56382 trivial. 0 not checked. [2023-02-17 08:29:44,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069806690] [2023-02-17 08:29:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069806690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885333205] [2023-02-17 08:29:44,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 08:29:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:44,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:44,199 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 08:29:44,200 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 08:29:50,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-17 08:29:50,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:50,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 08:29:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 48319 proven. 3482 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2023-02-17 08:29:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 49205 proven. 2596 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2023-02-17 08:29:51,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885333205] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:51,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:51,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2023-02-17 08:29:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635124838] [2023-02-17 08:29:51,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-17 08:29:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-17 08:29:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2023-02-17 08:29:51,125 INFO L87 Difference]: Start difference. First operand 1457 states and 1546 transitions. Second operand has 63 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 63 states have internal predecessors, (349), 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 08:29:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:53,622 INFO L93 Difference]: Finished difference Result 1457 states and 1534 transitions. [2023-02-17 08:29:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-17 08:29:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 63 states have internal predecessors, (349), 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 1076 [2023-02-17 08:29:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:53,628 INFO L225 Difference]: With dead ends: 1457 [2023-02-17 08:29:53,628 INFO L226 Difference]: Without dead ends: 1457 [2023-02-17 08:29:53,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2107 SyntacticMatches, 9 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4785 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3566, Invalid=14794, Unknown=0, NotChecked=0, Total=18360 [2023-02-17 08:29:53,631 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 157 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:53,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 250 Invalid, 3938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3914 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 08:29:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2023-02-17 08:29:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2023-02-17 08:29:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0535714285714286) internal successors, (1534), 1456 states have internal predecessors, (1534), 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 08:29:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1534 transitions. [2023-02-17 08:29:53,649 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1534 transitions. Word has length 1076 [2023-02-17 08:29:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:53,649 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1534 transitions. [2023-02-17 08:29:53,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 63 states have internal predecessors, (349), 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 08:29:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1534 transitions. [2023-02-17 08:29:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2023-02-17 08:29:53,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:53,660 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-17 08:29:53,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-17 08:29:53,871 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 08:29:53,871 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:29:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275497, now seen corresponding path program 12 times [2023-02-17 08:29:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138072232] [2023-02-17 08:29:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38226 proven. 1001 refuted. 0 times theorem prover too weak. 63204 trivial. 0 not checked. [2023-02-17 08:29:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138072232] [2023-02-17 08:29:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138072232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319970415] [2023-02-17 08:29:56,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 08:29:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:56,913 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 08:29:56,914 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 08:29:58,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-02-17 08:29:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:29:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 08:29:58,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:58,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:58,050 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 08:29:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 9973 proven. 20565 refuted. 0 times theorem prover too weak. 71893 trivial. 0 not checked. [2023-02-17 08:29:58,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38 proven. 30500 refuted. 0 times theorem prover too weak. 71893 trivial. 0 not checked. [2023-02-17 08:29:59,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319970415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:59,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:59,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 24] total 77 [2023-02-17 08:29:59,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874349678] [2023-02-17 08:29:59,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-17 08:29:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-17 08:29:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=5028, Unknown=0, NotChecked=0, Total=5852 [2023-02-17 08:29:59,700 INFO L87 Difference]: Start difference. First operand 1457 states and 1534 transitions. Second operand has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 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 08:30:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:06,540 INFO L93 Difference]: Finished difference Result 1605 states and 1686 transitions. [2023-02-17 08:30:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-02-17 08:30:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 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 1131 [2023-02-17 08:30:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:06,544 INFO L225 Difference]: With dead ends: 1605 [2023-02-17 08:30:06,544 INFO L226 Difference]: Without dead ends: 1605 [2023-02-17 08:30:06,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2483 GetRequests, 2215 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23281 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10761, Invalid=61869, Unknown=0, NotChecked=0, Total=72630 [2023-02-17 08:30:06,547 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2428 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:06,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 210 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 08:30:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2023-02-17 08:30:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1592. [2023-02-17 08:30:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0521684475172848) internal successors, (1674), 1591 states have internal predecessors, (1674), 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 08:30:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1674 transitions. [2023-02-17 08:30:06,564 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1674 transitions. Word has length 1131 [2023-02-17 08:30:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:06,565 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1674 transitions. [2023-02-17 08:30:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 4.662337662337662) internal successors, (359), 77 states have internal predecessors, (359), 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 08:30:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1674 transitions. [2023-02-17 08:30:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2023-02-17 08:30:06,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:06,578 INFO L195 NwaCegarLoop]: trace histogram [232, 232, 231, 231, 231, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 08:30:06,589 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 08:30:06,787 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 08:30:06,787 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:30:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 738738834, now seen corresponding path program 13 times [2023-02-17 08:30:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:06,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464762050] [2023-02-17 08:30:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 64944 proven. 1184 refuted. 0 times theorem prover too weak. 73753 trivial. 0 not checked. [2023-02-17 08:30:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:10,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464762050] [2023-02-17 08:30:10,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464762050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:10,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999302339] [2023-02-17 08:30:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 08:30:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:10,194 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 08:30:10,196 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 08:30:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 3982 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 08:30:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2023-02-17 08:30:11,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2023-02-17 08:30:12,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999302339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:12,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:12,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 66 [2023-02-17 08:30:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44928571] [2023-02-17 08:30:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:12,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-17 08:30:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-17 08:30:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3586, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 08:30:12,017 INFO L87 Difference]: Start difference. First operand 1592 states and 1674 transitions. Second operand has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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 08:30:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:15,809 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2023-02-17 08:30:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-02-17 08:30:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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 1308 [2023-02-17 08:30:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:15,814 INFO L225 Difference]: With dead ends: 1592 [2023-02-17 08:30:15,815 INFO L226 Difference]: Without dead ends: 1592 [2023-02-17 08:30:15,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2567 SyntacticMatches, 14 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4910, Invalid=23146, Unknown=0, NotChecked=0, Total=28056 [2023-02-17 08:30:15,817 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 5019 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 5040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 5019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:15,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 272 Invalid, 5040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 5019 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 08:30:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-17 08:30:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-17 08:30:15,831 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 08:30:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2023-02-17 08:30:15,833 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1308 [2023-02-17 08:30:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:15,834 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2023-02-17 08:30:15,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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 08:30:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2023-02-17 08:30:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2023-02-17 08:30:15,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:15,847 INFO L195 NwaCegarLoop]: trace histogram [241, 241, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 08:30:15,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-17 08:30:16,060 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 08:30:16,060 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 08:30:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1786428189, now seen corresponding path program 14 times [2023-02-17 08:30:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010595769] [2023-02-17 08:30:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 69671 proven. 1382 refuted. 0 times theorem prover too weak. 79619 trivial. 0 not checked. [2023-02-17 08:30:19,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010595769] [2023-02-17 08:30:19,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010595769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322019473] [2023-02-17 08:30:19,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:30:19,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:19,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:19,833 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 08:30:19,835 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 08:30:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:30:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:30:20,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 4108 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 08:30:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2023-02-17 08:30:21,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2023-02-17 08:30:21,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322019473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:21,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:21,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 71 [2023-02-17 08:30:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188733637] [2023-02-17 08:30:21,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:21,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-17 08:30:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-17 08:30:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4163, Unknown=0, NotChecked=0, Total=4970 [2023-02-17 08:30:21,726 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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 08:30:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:26,583 INFO L93 Difference]: Finished difference Result 1674 states and 1735 transitions. [2023-02-17 08:30:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-02-17 08:30:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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 1353 [2023-02-17 08:30:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:26,587 INFO L225 Difference]: With dead ends: 1674 [2023-02-17 08:30:26,587 INFO L226 Difference]: Without dead ends: 1674 [2023-02-17 08:30:26,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2854 GetRequests, 2653 SyntacticMatches, 15 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9226 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6114, Invalid=29042, Unknown=0, NotChecked=0, Total=35156 [2023-02-17 08:30:26,590 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 177 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 6841 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:26,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 197 Invalid, 6863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6841 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 08:30:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2023-02-17 08:30:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1664. [2023-02-17 08:30:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.0372820204449789) internal successors, (1725), 1663 states have internal predecessors, (1725), 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 08:30:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 1725 transitions. [2023-02-17 08:30:26,607 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 1725 transitions. Word has length 1353 [2023-02-17 08:30:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:26,608 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 1725 transitions. [2023-02-17 08:30:26,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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 08:30:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 1725 transitions. [2023-02-17 08:30:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2023-02-17 08:30:26,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:26,622 INFO L195 NwaCegarLoop]: trace histogram [249, 249, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 08:30:26,639 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 08:30:26,833 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 08:30:26,834 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:30:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash -524826813, now seen corresponding path program 15 times [2023-02-17 08:30:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:26,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089652442] [2023-02-17 08:30:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 74167 proven. 1595 refuted. 0 times theorem prover too weak. 84842 trivial. 0 not checked. [2023-02-17 08:30:30,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089652442] [2023-02-17 08:30:30,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089652442] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476461990] [2023-02-17 08:30:30,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:30:30,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:30,767 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 08:30:30,768 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 08:30:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-17 08:30:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:30:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 08:30:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:32,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:32,232 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 08:30:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2023-02-17 08:30:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2023-02-17 08:30:34,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476461990] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:34,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:34,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 26] total 84 [2023-02-17 08:30:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399726422] [2023-02-17 08:30:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-17 08:30:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-17 08:30:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=5984, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 08:30:34,167 INFO L87 Difference]: Start difference. First operand 1664 states and 1725 transitions. Second operand has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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 08:30:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:38,701 INFO L93 Difference]: Finished difference Result 2063 states and 2130 transitions. [2023-02-17 08:30:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-17 08:30:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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 1393 [2023-02-17 08:30:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:38,707 INFO L225 Difference]: With dead ends: 2063 [2023-02-17 08:30:38,707 INFO L226 Difference]: Without dead ends: 2063 [2023-02-17 08:30:38,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2934 GetRequests, 2737 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10805 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7047, Invalid=32355, Unknown=0, NotChecked=0, Total=39402 [2023-02-17 08:30:38,713 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2924 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2924 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:38,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2924 Valid, 438 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-17 08:30:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-02-17 08:30:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1783. [2023-02-17 08:30:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0336700336700337) internal successors, (1842), 1782 states have internal predecessors, (1842), 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 08:30:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1842 transitions. [2023-02-17 08:30:38,752 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1842 transitions. Word has length 1393 [2023-02-17 08:30:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:38,753 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1842 transitions. [2023-02-17 08:30:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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 08:30:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1842 transitions. [2023-02-17 08:30:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2023-02-17 08:30:38,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:38,768 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 265, 265, 265, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 08:30:38,779 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 08:30:38,978 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 08:30:38,979 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:30:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash -950517878, now seen corresponding path program 16 times [2023-02-17 08:30:38,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185745011] [2023-02-17 08:30:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:38,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 89052 proven. 1823 refuted. 0 times theorem prover too weak. 91897 trivial. 0 not checked. [2023-02-17 08:30:43,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185745011] [2023-02-17 08:30:43,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185745011] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888996095] [2023-02-17 08:30:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:30:43,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:43,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:43,468 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 08:30:43,469 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 08:30:59,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:30:59,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:30:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 4458 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 08:30:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:31:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2023-02-17 08:31:00,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:31:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2023-02-17 08:31:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888996095] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:31:01,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:31:01,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 91 [2023-02-17 08:31:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858080245] [2023-02-17 08:31:01,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:31:01,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-02-17 08:31:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:31:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-02-17 08:31:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=6882, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 08:31:01,401 INFO L87 Difference]: Start difference. First operand 1783 states and 1842 transitions. Second operand has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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 08:31:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:31:14,219 INFO L93 Difference]: Finished difference Result 2385 states and 2423 transitions. [2023-02-17 08:31:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2023-02-17 08:31:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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 1478 [2023-02-17 08:31:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:31:14,225 INFO L225 Difference]: With dead ends: 2385 [2023-02-17 08:31:14,225 INFO L226 Difference]: Without dead ends: 2385 [2023-02-17 08:31:14,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3234 GetRequests, 2885 SyntacticMatches, 17 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29757 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=20878, Invalid=90344, Unknown=0, NotChecked=0, Total=111222 [2023-02-17 08:31:14,233 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 223 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 14015 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 14045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 14015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:31:14,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 408 Invalid, 14045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 14015 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-17 08:31:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2023-02-17 08:31:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2375. [2023-02-17 08:31:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 1.0164279696714407) internal successors, (2413), 2374 states have internal predecessors, (2413), 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 08:31:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2413 transitions. [2023-02-17 08:31:14,254 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2413 transitions. Word has length 1478 [2023-02-17 08:31:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:31:14,254 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 2413 transitions. [2023-02-17 08:31:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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 08:31:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2413 transitions. [2023-02-17 08:31:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1554 [2023-02-17 08:31:14,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:31:14,272 INFO L195 NwaCegarLoop]: trace histogram [281, 281, 280, 280, 280, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-17 08:31:14,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-17 08:31:14,481 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 08:31:14,481 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-17 08:31:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:31:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2011725613, now seen corresponding path program 17 times [2023-02-17 08:31:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:31:14,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775454900] [2023-02-17 08:31:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:31:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:31:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:31:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 111350 proven. 2324 refuted. 0 times theorem prover too weak. 89858 trivial. 0 not checked. [2023-02-17 08:31:20,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:31:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775454900] [2023-02-17 08:31:20,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775454900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:31:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364094683] [2023-02-17 08:31:20,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 08:31:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:31:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:31:20,144 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 08:31:20,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process