./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 05:14:01,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 05:14:01,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 05:14:01,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 05:14:01,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 05:14:01,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 05:14:01,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 05:14:01,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 05:14:01,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 05:14:01,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 05:14:01,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 05:14:01,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 05:14:01,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 05:14:01,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 05:14:01,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 05:14:01,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 05:14:01,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 05:14:01,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 05:14:01,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 05:14:01,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 05:14:01,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 05:14:01,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 05:14:01,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 05:14:01,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 05:14:01,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 05:14:01,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 05:14:01,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 05:14:01,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 05:14:01,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 05:14:01,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 05:14:01,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 05:14:01,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 05:14:01,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 05:14:01,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 05:14:01,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 05:14:01,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 05:14:01,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 05:14:01,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 05:14:01,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 05:14:01,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 05:14:01,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 05:14:01,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 05:14:01,490 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 05:14:01,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 05:14:01,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 05:14:01,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 05:14:01,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 05:14:01,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 05:14:01,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 05:14:01,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 05:14:01,492 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 05:14:01,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 05:14:01,493 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 05:14:01,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 05:14:01,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 05:14:01,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 05:14:01,494 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 05:14:01,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 05:14:01,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 05:14:01,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 05:14:01,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 05:14:01,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:14:01,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 05:14:01,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 05:14:01,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 05:14:01,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 05:14:01,497 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 05:14:01,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2023-02-17 05:14:01,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 05:14:01,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 05:14:01,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 05:14:01,777 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 05:14:01,778 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 05:14:01,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-17 05:14:02,944 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 05:14:03,127 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 05:14:03,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-17 05:14:03,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d85ba0f2/65cf5e5017c84981ae83d9a771d4d0c8/FLAG159e86db7 [2023-02-17 05:14:03,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d85ba0f2/65cf5e5017c84981ae83d9a771d4d0c8 [2023-02-17 05:14:03,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 05:14:03,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 05:14:03,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 05:14:03,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 05:14:03,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 05:14:03,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1b21ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03, skipping insertion in model container [2023-02-17 05:14:03,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 05:14:03,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 05:14:03,316 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-17 05:14:03,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:14:03,347 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 05:14:03,362 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-17 05:14:03,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:14:03,391 INFO L208 MainTranslator]: Completed translation [2023-02-17 05:14:03,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03 WrapperNode [2023-02-17 05:14:03,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 05:14:03,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 05:14:03,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 05:14:03,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 05:14:03,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,436 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-17 05:14:03,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 05:14:03,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 05:14:03,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 05:14:03,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 05:14:03,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 05:14:03,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 05:14:03,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 05:14:03,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 05:14:03,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (1/1) ... [2023-02-17 05:14:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:14:03,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:03,514 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 05:14:03,538 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 05:14:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 05:14:03,553 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 05:14:03,553 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 05:14:03,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 05:14:03,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 05:14:03,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 05:14:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 05:14:03,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 05:14:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 05:14:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 05:14:03,628 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 05:14:03,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 05:14:03,787 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 05:14:03,797 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 05:14:03,798 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 05:14:03,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:14:03 BoogieIcfgContainer [2023-02-17 05:14:03,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 05:14:03,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 05:14:03,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 05:14:03,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 05:14:03,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 05:14:03" (1/3) ... [2023-02-17 05:14:03,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c197b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:14:03, skipping insertion in model container [2023-02-17 05:14:03,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:14:03" (2/3) ... [2023-02-17 05:14:03,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c197b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:14:03, skipping insertion in model container [2023-02-17 05:14:03,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:14:03" (3/3) ... [2023-02-17 05:14:03,825 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-02-17 05:14:03,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 05:14:03,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 05:14:03,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 05:14:03,935 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@6fd69b48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 05:14:03,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 05:14:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 05:14:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 05:14:03,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:03,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:03,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2023-02-17 05:14:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191929557] [2023-02-17 05:14:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:03,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:14:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191929557] [2023-02-17 05:14:04,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191929557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:14:04,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:14:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:14:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922509286] [2023-02-17 05:14:04,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:14:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:14:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:14:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:14:04,338 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:14:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:04,379 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2023-02-17 05:14:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 05:14:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-17 05:14:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:04,388 INFO L225 Difference]: With dead ends: 64 [2023-02-17 05:14:04,388 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 05:14:04,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 05:14:04,393 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:04,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:14:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 05:14:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 05:14:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 05:14:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-17 05:14:04,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-02-17 05:14:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:04,426 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-17 05:14:04,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:14:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-17 05:14:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 05:14:04,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:04,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 05:14:04,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2023-02-17 05:14:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989125109] [2023-02-17 05:14:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:04,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:14:04,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:04,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989125109] [2023-02-17 05:14:04,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989125109] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:14:04,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:14:04,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 05:14:04,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515409339] [2023-02-17 05:14:04,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:14:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 05:14:04,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 05:14:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:14:04,587 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:14:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:04,651 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-02-17 05:14:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 05:14:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-17 05:14:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:04,652 INFO L225 Difference]: With dead ends: 50 [2023-02-17 05:14:04,653 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 05:14:04,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 05:14:04,654 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:04,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:14:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 05:14:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-02-17 05:14:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 05:14:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-17 05:14:04,662 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2023-02-17 05:14:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:04,662 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-17 05:14:04,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:14:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-17 05:14:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 05:14:04,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:04,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 05:14:04,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2023-02-17 05:14:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177889746] [2023-02-17 05:14:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:04,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:05,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:05,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:05,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177889746] [2023-02-17 05:14:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177889746] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873686150] [2023-02-17 05:14:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:05,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:05,313 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 05:14:05,332 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 05:14:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 05:14:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:05,516 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:05,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:05,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2023-02-17 05:14:05,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:05,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 66 [2023-02-17 05:14:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:05,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:07,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:07,784 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 22 treesize of output 23 [2023-02-17 05:14:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873686150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:07,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-17 05:14:07,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651226273] [2023-02-17 05:14:07,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 05:14:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 05:14:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2023-02-17 05:14:07,829 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 05:14:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:08,077 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-17 05:14:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 05:14:08,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-17 05:14:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:08,082 INFO L225 Difference]: With dead ends: 54 [2023-02-17 05:14:08,082 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 05:14:08,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2023-02-17 05:14:08,083 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:08,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 05:14:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 05:14:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-17 05:14:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:14:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-17 05:14:08,093 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-17 05:14:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:08,094 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-17 05:14:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 05:14:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-17 05:14:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 05:14:08,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:08,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:08,104 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 05:14:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:08,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2023-02-17 05:14:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5504812] [2023-02-17 05:14:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:08,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:08,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5504812] [2023-02-17 05:14:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5504812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:08,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204118010] [2023-02-17 05:14:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:08,644 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 05:14:08,671 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 05:14:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 05:14:08,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:08,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:08,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:08,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2023-02-17 05:14:08,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:08,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 66 [2023-02-17 05:14:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:08,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:08,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:08,918 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 22 treesize of output 23 [2023-02-17 05:14:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:14:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204118010] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:08,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2023-02-17 05:14:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495645609] [2023-02-17 05:14:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 05:14:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 05:14:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-02-17 05:14:08,959 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 05:14:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:09,247 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-02-17 05:14:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 05:14:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-17 05:14:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:09,254 INFO L225 Difference]: With dead ends: 68 [2023-02-17 05:14:09,255 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 05:14:09,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-02-17 05:14:09,257 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:09,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 05:14:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 05:14:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2023-02-17 05:14:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:14:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-17 05:14:09,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-17 05:14:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:09,279 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-17 05:14:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 05:14:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-17 05:14:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 05:14:09,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:09,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:09,292 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 05:14:09,488 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,SelfDestructingSolverStorable3 [2023-02-17 05:14:09,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:09,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2023-02-17 05:14:09,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:09,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833860144] [2023-02-17 05:14:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:09,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:09,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:09,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 05:14:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833860144] [2023-02-17 05:14:09,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833860144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831611179] [2023-02-17 05:14:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:14:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:09,564 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 05:14:09,567 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 05:14:09,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:14:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 05:14:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 05:14:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 05:14:09,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831611179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:09,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:09,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 05:14:09,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953680284] [2023-02-17 05:14:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:09,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 05:14:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 05:14:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:14:09,681 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 05:14:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:09,776 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-17 05:14:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:14:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-02-17 05:14:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:09,780 INFO L225 Difference]: With dead ends: 88 [2023-02-17 05:14:09,780 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 05:14:09,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-17 05:14:09,781 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:09,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:14:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 05:14:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-17 05:14:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:14:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-17 05:14:09,792 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2023-02-17 05:14:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:09,793 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-17 05:14:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 05:14:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-17 05:14:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 05:14:09,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:09,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:09,801 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 05:14:09,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:10,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2023-02-17 05:14:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:10,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176090813] [2023-02-17 05:14:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:10,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:10,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:10,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 05:14:10,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176090813] [2023-02-17 05:14:10,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176090813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410025646] [2023-02-17 05:14:10,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 05:14:10,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:10,094 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 05:14:10,116 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 05:14:10,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 05:14:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 05:14:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 05:14:10,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 05:14:10,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410025646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:10,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:10,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 05:14:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329131567] [2023-02-17 05:14:10,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 05:14:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 05:14:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:14:10,209 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:14:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:10,328 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-17 05:14:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:14:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-17 05:14:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:10,332 INFO L225 Difference]: With dead ends: 59 [2023-02-17 05:14:10,332 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 05:14:10,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-17 05:14:10,333 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:10,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:14:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 05:14:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-02-17 05:14:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:14:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-17 05:14:10,340 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2023-02-17 05:14:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:10,340 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-17 05:14:10,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:14:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-17 05:14:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 05:14:10,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:10,342 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:10,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 05:14:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:10,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2023-02-17 05:14:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488276594] [2023-02-17 05:14:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:11,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:11,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:11,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 05:14:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:11,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488276594] [2023-02-17 05:14:11,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488276594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:11,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315973608] [2023-02-17 05:14:11,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 05:14:11,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:11,361 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 05:14:11,384 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 05:14:11,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 05:14:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 05:14:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:11,464 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 05:14:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:11,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2023-02-17 05:14:11,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 66 [2023-02-17 05:14:11,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 30 [2023-02-17 05:14:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 05:14:11,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:12,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315973608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:12,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:14:12,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-17 05:14:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984912688] [2023-02-17 05:14:12,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 05:14:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 05:14:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 05:14:12,892 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:14,648 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2023-02-17 05:14:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 05:14:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-17 05:14:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:14,653 INFO L225 Difference]: With dead ends: 93 [2023-02-17 05:14:14,654 INFO L226 Difference]: Without dead ends: 89 [2023-02-17 05:14:14,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=728, Invalid=4528, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 05:14:14,656 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:14,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 338 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 05:14:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-17 05:14:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2023-02-17 05:14:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 05:14:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-02-17 05:14:14,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2023-02-17 05:14:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:14,667 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-02-17 05:14:14,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-02-17 05:14:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 05:14:14,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:14,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:14,674 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 05:14:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:14,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2023-02-17 05:14:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850982357] [2023-02-17 05:14:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 05:14:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:15,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850982357] [2023-02-17 05:14:15,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850982357] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:15,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037804800] [2023-02-17 05:14:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:15,606 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 05:14:15,632 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 05:14:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 05:14:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:15,692 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 05:14:15,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:15,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-02-17 05:14:15,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 77 [2023-02-17 05:14:16,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 39 [2023-02-17 05:14:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 05:14:16,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:16,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037804800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:16,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:14:16,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-17 05:14:16,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293058893] [2023-02-17 05:14:16,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:16,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 05:14:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 05:14:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 05:14:16,666 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:19,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 05:14:22,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 05:14:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:22,361 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2023-02-17 05:14:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 05:14:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-17 05:14:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:22,362 INFO L225 Difference]: With dead ends: 121 [2023-02-17 05:14:22,362 INFO L226 Difference]: Without dead ends: 115 [2023-02-17 05:14:22,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=783, Invalid=4917, Unknown=0, NotChecked=0, Total=5700 [2023-02-17 05:14:22,364 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 92 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:22,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 302 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1025 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-02-17 05:14:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-17 05:14:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2023-02-17 05:14:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2023-02-17 05:14:22,378 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 50 [2023-02-17 05:14:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:22,378 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2023-02-17 05:14:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2023-02-17 05:14:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 05:14:22,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:22,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:22,385 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 05:14:22,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:22,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2023-02-17 05:14:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237769738] [2023-02-17 05:14:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:23,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:23,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 05:14:23,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237769738] [2023-02-17 05:14:23,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237769738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368210916] [2023-02-17 05:14:23,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:14:23,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:23,312 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 05:14:23,318 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 05:14:23,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:14:23,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 05:14:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:23,436 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 05:14:23,742 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:23,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2023-02-17 05:14:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 68 [2023-02-17 05:14:24,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 33 [2023-02-17 05:14:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 05:14:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:26,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368210916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:26,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:14:26,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2023-02-17 05:14:26,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857019167] [2023-02-17 05:14:26,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:26,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 05:14:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 05:14:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2596, Unknown=1, NotChecked=0, Total=2862 [2023-02-17 05:14:26,689 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 42 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:28,450 INFO L93 Difference]: Finished difference Result 158 states and 203 transitions. [2023-02-17 05:14:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 05:14:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-17 05:14:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:28,452 INFO L225 Difference]: With dead ends: 158 [2023-02-17 05:14:28,452 INFO L226 Difference]: Without dead ends: 154 [2023-02-17 05:14:28,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=985, Invalid=6496, Unknown=1, NotChecked=0, Total=7482 [2023-02-17 05:14:28,454 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:28,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 250 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 05:14:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-17 05:14:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 80. [2023-02-17 05:14:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 05:14:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2023-02-17 05:14:28,471 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 50 [2023-02-17 05:14:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:28,471 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2023-02-17 05:14:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2023-02-17 05:14:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 05:14:28,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:28,473 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:28,479 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 05:14:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:28,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2023-02-17 05:14:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:28,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392861943] [2023-02-17 05:14:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:29,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:29,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:29,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 05:14:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392861943] [2023-02-17 05:14:29,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392861943] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220186516] [2023-02-17 05:14:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:14:29,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:29,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:29,416 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 05:14:29,441 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 05:14:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:14:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 05:14:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:29,497 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 05:14:29,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:29,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-02-17 05:14:29,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 77 [2023-02-17 05:14:29,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 42 [2023-02-17 05:14:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 05:14:30,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:32,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220186516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:32,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:14:32,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-02-17 05:14:32,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525073003] [2023-02-17 05:14:32,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:32,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-17 05:14:32,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-17 05:14:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 05:14:32,286 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:35,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 05:14:37,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 05:14:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:38,012 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2023-02-17 05:14:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 05:14:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-17 05:14:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:38,014 INFO L225 Difference]: With dead ends: 164 [2023-02-17 05:14:38,014 INFO L226 Difference]: Without dead ends: 158 [2023-02-17 05:14:38,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=795, Invalid=5211, Unknown=0, NotChecked=0, Total=6006 [2023-02-17 05:14:38,016 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 101 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:38,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 315 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1019 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-02-17 05:14:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-17 05:14:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 74. [2023-02-17 05:14:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2023-02-17 05:14:38,033 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 50 [2023-02-17 05:14:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:38,033 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2023-02-17 05:14:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2023-02-17 05:14:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 05:14:38,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:38,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:38,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 05:14:38,240 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,SelfDestructingSolverStorable9 [2023-02-17 05:14:38,240 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2023-02-17 05:14:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294475949] [2023-02-17 05:14:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 05:14:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294475949] [2023-02-17 05:14:38,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294475949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:38,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087517782] [2023-02-17 05:14:38,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 05:14:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:38,333 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 05:14:38,358 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 05:14:38,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 05:14:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 05:14:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 05:14:38,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 05:14:38,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087517782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:38,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:38,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 05:14:38,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606994418] [2023-02-17 05:14:38,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 05:14:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 05:14:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 05:14:38,488 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:14:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:38,606 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2023-02-17 05:14:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 05:14:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-02-17 05:14:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:38,607 INFO L225 Difference]: With dead ends: 140 [2023-02-17 05:14:38,607 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 05:14:38,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-17 05:14:38,608 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:38,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 126 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:14:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 05:14:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2023-02-17 05:14:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 05:14:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-02-17 05:14:38,625 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 52 [2023-02-17 05:14:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:38,625 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-02-17 05:14:38,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:14:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-02-17 05:14:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 05:14:38,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:38,626 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:38,633 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 05:14:38,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:38,829 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2023-02-17 05:14:38,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074655833] [2023-02-17 05:14:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:38,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 05:14:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-17 05:14:38,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:38,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074655833] [2023-02-17 05:14:38,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074655833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883024534] [2023-02-17 05:14:38,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 05:14:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:38,925 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 05:14:38,932 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 05:14:38,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-17 05:14:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 05:14:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-17 05:14:39,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-17 05:14:39,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883024534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:14:39,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:14:39,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 05:14:39,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660809501] [2023-02-17 05:14:39,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:39,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 05:14:39,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 05:14:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 05:14:39,079 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 05:14:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:39,193 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2023-02-17 05:14:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 05:14:39,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2023-02-17 05:14:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:39,194 INFO L225 Difference]: With dead ends: 98 [2023-02-17 05:14:39,194 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 05:14:39,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-17 05:14:39,195 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:39,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 110 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:14:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 05:14:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2023-02-17 05:14:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:14:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-17 05:14:39,207 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2023-02-17 05:14:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:39,207 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-17 05:14:39,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 05:14:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-17 05:14:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 05:14:39,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:39,208 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:39,213 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 05:14:39,412 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,SelfDestructingSolverStorable11 [2023-02-17 05:14:39,413 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2023-02-17 05:14:39,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:39,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158197839] [2023-02-17 05:14:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 05:14:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 05:14:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:40,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158197839] [2023-02-17 05:14:40,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158197839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:40,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190053301] [2023-02-17 05:14:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 05:14:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:40,754 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 05:14:40,773 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 05:14:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-17 05:14:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:40,857 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 05:14:41,340 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:41,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2023-02-17 05:14:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:41,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:41,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 85 [2023-02-17 05:14:41,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 104 [2023-02-17 05:14:42,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 46 [2023-02-17 05:14:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 05:14:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:14:44,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190053301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:44,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:14:44,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2023-02-17 05:14:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736729230] [2023-02-17 05:14:44,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:14:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-17 05:14:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:14:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-17 05:14:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3978, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 05:14:44,657 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 05:14:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:14:49,528 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2023-02-17 05:14:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-17 05:14:49,529 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-17 05:14:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:14:49,530 INFO L225 Difference]: With dead ends: 149 [2023-02-17 05:14:49,530 INFO L226 Difference]: Without dead ends: 143 [2023-02-17 05:14:49,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1382, Invalid=14118, Unknown=0, NotChecked=0, Total=15500 [2023-02-17 05:14:49,534 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 154 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 05:14:49,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 615 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 05:14:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-17 05:14:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2023-02-17 05:14:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 89 states have internal predecessors, (113), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 05:14:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2023-02-17 05:14:49,563 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 64 [2023-02-17 05:14:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:14:49,564 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2023-02-17 05:14:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 05:14:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2023-02-17 05:14:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 05:14:49,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:14:49,565 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:14:49,573 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 05:14:49,769 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,SelfDestructingSolverStorable12 [2023-02-17 05:14:49,769 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:14:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:14:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2023-02-17 05:14:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:14:49,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036803145] [2023-02-17 05:14:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:14:49,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:14:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:14:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 05:14:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:14:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 05:14:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 05:14:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:14:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 05:14:50,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:14:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036803145] [2023-02-17 05:14:50,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036803145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:14:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593999594] [2023-02-17 05:14:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 05:14:50,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:14:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:14:50,976 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 05:14:50,978 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 05:14:51,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 05:14:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:14:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-17 05:14:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:14:51,141 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 05:14:51,653 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:14:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:14:51,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2023-02-17 05:14:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2023-02-17 05:14:51,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:14:51,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 217 treesize of output 257 [2023-02-17 05:15:03,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:15:03,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 192 select indices, 192 select index equivalence classes, 3 disjoint index pairs (out of 18336 index pairs), introduced 192 new quantified variables, introduced 18336 case distinctions, treesize of input 11515 treesize of output 233296