./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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/aws-c-common/aws_linked_list_swap_contents_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 11:25:16,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 11:25:16,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 11:25:16,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 11:25:16,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 11:25:16,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 11:25:16,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 11:25:16,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 11:25:16,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 11:25:16,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 11:25:16,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 11:25:16,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 11:25:16,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 11:25:16,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 11:25:16,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 11:25:16,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 11:25:16,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 11:25:16,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 11:25:16,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 11:25:16,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 11:25:16,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 11:25:16,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 11:25:16,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 11:25:16,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 11:25:16,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 11:25:16,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 11:25:16,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 11:25:16,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 11:25:16,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 11:25:16,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 11:25:16,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 11:25:16,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 11:25:16,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 11:25:16,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 11:25:16,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 11:25:16,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 11:25:16,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 11:25:16,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 11:25:16,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 11:25:16,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 11:25:16,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 11:25:16,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 11:25:16,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 11:25:16,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 11:25:16,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 11:25:16,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 11:25:16,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 11:25:16,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 11:25:16,376 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 11:25:16,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 11:25:16,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 11:25:16,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 11:25:16,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 11:25:16,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 11:25:16,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 11:25:16,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 11:25:16,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 11:25:16,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 11:25:16,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 11:25:16,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 11:25:16,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 11:25:16,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:25:16,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 11:25:16,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 11:25:16,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 11:25:16,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 11:25:16,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-06 11:25:16,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 11:25:16,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 11:25:16,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 11:25:16,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 11:25:16,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 11:25:16,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-06 11:25:16,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8447021d/10b835dfeb3d429986165607007bcf36/FLAG9e052e64d [2021-11-06 11:25:17,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 11:25:17,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-06 11:25:17,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8447021d/10b835dfeb3d429986165607007bcf36/FLAG9e052e64d [2021-11-06 11:25:17,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8447021d/10b835dfeb3d429986165607007bcf36 [2021-11-06 11:25:17,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 11:25:17,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 11:25:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 11:25:17,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 11:25:17,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 11:25:17,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:25:17" (1/1) ... [2021-11-06 11:25:17,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bff7495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:17, skipping insertion in model container [2021-11-06 11:25:17,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:25:17" (1/1) ... [2021-11-06 11:25:17,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 11:25:17,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 11:25:17,842 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-06 11:25:17,849 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-06 11:25:17,865 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:25:17,869 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:25:18,421 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,423 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,424 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,426 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,429 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,446 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,448 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,454 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,454 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,459 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,461 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,462 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,463 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:25:18,710 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:25:18,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:25:18,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:25:18,713 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:25:18,714 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:25:18,714 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:25:18,715 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:25:18,722 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:25:18,723 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:25:18,835 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:25:18,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:25:18,900 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 11:25:18,923 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-06 11:25:18,924 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-06 11:25:18,926 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:25:18,927 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:25:18,971 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,971 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,975 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,976 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,988 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,990 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,990 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,991 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:18,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:25:19,037 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:25:19,038 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:25:19,038 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:25:19,039 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:25:19,039 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:25:19,040 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:25:19,040 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:25:19,040 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:25:19,041 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:25:19,041 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:25:19,060 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:25:19,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:25:19,249 INFO L208 MainTranslator]: Completed translation [2021-11-06 11:25:19,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19 WrapperNode [2021-11-06 11:25:19,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 11:25:19,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 11:25:19,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 11:25:19,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 11:25:19,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 11:25:19,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 11:25:19,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 11:25:19,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 11:25:19,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 11:25:19,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 11:25:19,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 11:25:19,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 11:25:19,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (1/1) ... [2021-11-06 11:25:19,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:25:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:25:19,589 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) [2021-11-06 11:25:19,598 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 [2021-11-06 11:25:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 11:25:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 11:25:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 11:25:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 11:25:19,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 11:25:19,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 11:25:19,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 11:25:19,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 11:25:19,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 11:25:20,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 11:25:20,671 INFO L299 CfgBuilder]: Removed 138 assume(true) statements. [2021-11-06 11:25:20,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:25:20 BoogieIcfgContainer [2021-11-06 11:25:20,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 11:25:20,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 11:25:20,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 11:25:20,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 11:25:20,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:25:17" (1/3) ... [2021-11-06 11:25:20,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7459874c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:25:20, skipping insertion in model container [2021-11-06 11:25:20,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:25:19" (2/3) ... [2021-11-06 11:25:20,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7459874c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:25:20, skipping insertion in model container [2021-11-06 11:25:20,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:25:20" (3/3) ... [2021-11-06 11:25:20,683 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-06 11:25:20,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 11:25:20,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-06 11:25:20,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 11:25:20,748 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 11:25:20,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-06 11:25:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:20,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:20,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:20,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2109692067, now seen corresponding path program 1 times [2021-11-06 11:25:20,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:20,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103890419] [2021-11-06 11:25:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:20,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:21,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:21,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103890419] [2021-11-06 11:25:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103890419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:21,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:21,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 11:25:21,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141202374] [2021-11-06 11:25:21,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 11:25:21,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 11:25:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:25:21,110 INFO L87 Difference]: Start difference. First operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:21,143 INFO L93 Difference]: Finished difference Result 530 states and 785 transitions. [2021-11-06 11:25:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 11:25:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:21,153 INFO L225 Difference]: With dead ends: 530 [2021-11-06 11:25:21,154 INFO L226 Difference]: Without dead ends: 260 [2021-11-06 11:25:21,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:25:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-06 11:25:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-06 11:25:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 259 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 352 transitions. [2021-11-06 11:25:21,206 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 352 transitions. Word has length 53 [2021-11-06 11:25:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 352 transitions. [2021-11-06 11:25:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 352 transitions. [2021-11-06 11:25:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:21,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:21,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:21,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 11:25:21,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1639619295, now seen corresponding path program 1 times [2021-11-06 11:25:21,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:21,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204529445] [2021-11-06 11:25:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:21,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:21,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:21,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204529445] [2021-11-06 11:25:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204529445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:21,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:21,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:25:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195110788] [2021-11-06 11:25:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:25:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:25:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:25:21,344 INFO L87 Difference]: Start difference. First operand 260 states and 352 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:21,621 INFO L93 Difference]: Finished difference Result 563 states and 782 transitions. [2021-11-06 11:25:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:25:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:21,629 INFO L225 Difference]: With dead ends: 563 [2021-11-06 11:25:21,629 INFO L226 Difference]: Without dead ends: 324 [2021-11-06 11:25:21,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-06 11:25:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 276. [2021-11-06 11:25:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 262 states have (on average 1.4045801526717556) internal successors, (368), 275 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 368 transitions. [2021-11-06 11:25:21,662 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 368 transitions. Word has length 53 [2021-11-06 11:25:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:21,662 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 368 transitions. [2021-11-06 11:25:21,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 368 transitions. [2021-11-06 11:25:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:21,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:21,672 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:21,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 11:25:21,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 795613793, now seen corresponding path program 1 times [2021-11-06 11:25:21,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:21,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260786283] [2021-11-06 11:25:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:21,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:21,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:21,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260786283] [2021-11-06 11:25:21,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260786283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:21,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:21,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:25:21,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506313050] [2021-11-06 11:25:21,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:25:21,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:25:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:25:21,830 INFO L87 Difference]: Start difference. First operand 276 states and 368 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:21,991 INFO L93 Difference]: Finished difference Result 559 states and 761 transitions. [2021-11-06 11:25:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:25:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:21,993 INFO L225 Difference]: With dead ends: 559 [2021-11-06 11:25:21,993 INFO L226 Difference]: Without dead ends: 308 [2021-11-06 11:25:21,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-06 11:25:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2021-11-06 11:25:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 286 states have (on average 1.3706293706293706) internal successors, (392), 299 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 392 transitions. [2021-11-06 11:25:22,023 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 392 transitions. Word has length 53 [2021-11-06 11:25:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 392 transitions. [2021-11-06 11:25:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 392 transitions. [2021-11-06 11:25:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:22,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:22,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:22,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 11:25:22,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash 725074277, now seen corresponding path program 1 times [2021-11-06 11:25:22,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:22,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936342457] [2021-11-06 11:25:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:22,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:22,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:22,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936342457] [2021-11-06 11:25:22,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936342457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:22,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:22,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:25:22,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509410094] [2021-11-06 11:25:22,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:25:22,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:25:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:25:22,116 INFO L87 Difference]: Start difference. First operand 300 states and 392 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:22,285 INFO L93 Difference]: Finished difference Result 659 states and 847 transitions. [2021-11-06 11:25:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:25:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:22,287 INFO L225 Difference]: With dead ends: 659 [2021-11-06 11:25:22,287 INFO L226 Difference]: Without dead ends: 380 [2021-11-06 11:25:22,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-06 11:25:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 316. [2021-11-06 11:25:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 302 states have (on average 1.3509933774834437) internal successors, (408), 315 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 408 transitions. [2021-11-06 11:25:22,295 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 408 transitions. Word has length 53 [2021-11-06 11:25:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 408 transitions. [2021-11-06 11:25:22,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 408 transitions. [2021-11-06 11:25:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:22,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:22,296 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 11:25:22,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash 871955103, now seen corresponding path program 1 times [2021-11-06 11:25:22,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:22,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89152947] [2021-11-06 11:25:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:22,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:22,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:22,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89152947] [2021-11-06 11:25:22,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89152947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:22,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:22,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:25:22,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942955252] [2021-11-06 11:25:22,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:25:22,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:25:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:22,433 INFO L87 Difference]: Start difference. First operand 316 states and 408 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:22,572 INFO L93 Difference]: Finished difference Result 562 states and 722 transitions. [2021-11-06 11:25:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:25:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:22,574 INFO L225 Difference]: With dead ends: 562 [2021-11-06 11:25:22,574 INFO L226 Difference]: Without dead ends: 310 [2021-11-06 11:25:22,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:25:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-06 11:25:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-11-06 11:25:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 296 states have (on average 1.347972972972973) internal successors, (399), 309 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 399 transitions. [2021-11-06 11:25:22,604 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 399 transitions. Word has length 53 [2021-11-06 11:25:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:22,604 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 399 transitions. [2021-11-06 11:25:22,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 399 transitions. [2021-11-06 11:25:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 11:25:22,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:22,605 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:22,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 11:25:22,606 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1234547367, now seen corresponding path program 1 times [2021-11-06 11:25:22,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:22,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888754103] [2021-11-06 11:25:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:22,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:22,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:22,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888754103] [2021-11-06 11:25:22,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888754103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:22,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:22,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:25:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337591118] [2021-11-06 11:25:22,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:25:22,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:25:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:25:22,679 INFO L87 Difference]: Start difference. First operand 310 states and 399 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:22,793 INFO L93 Difference]: Finished difference Result 660 states and 826 transitions. [2021-11-06 11:25:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:25:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 11:25:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:22,796 INFO L225 Difference]: With dead ends: 660 [2021-11-06 11:25:22,796 INFO L226 Difference]: Without dead ends: 378 [2021-11-06 11:25:22,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-06 11:25:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 298. [2021-11-06 11:25:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 284 states have (on average 1.3309859154929577) internal successors, (378), 297 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 378 transitions. [2021-11-06 11:25:22,804 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 378 transitions. Word has length 53 [2021-11-06 11:25:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:22,805 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 378 transitions. [2021-11-06 11:25:22,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 378 transitions. [2021-11-06 11:25:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 11:25:22,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:22,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:22,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 11:25:22,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1042091935, now seen corresponding path program 1 times [2021-11-06 11:25:22,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:22,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478409296] [2021-11-06 11:25:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:22,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:22,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:22,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478409296] [2021-11-06 11:25:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478409296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:22,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:22,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:25:22,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580369661] [2021-11-06 11:25:22,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:25:22,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:25:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:22,903 INFO L87 Difference]: Start difference. First operand 298 states and 378 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:23,052 INFO L93 Difference]: Finished difference Result 616 states and 772 transitions. [2021-11-06 11:25:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:25:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-06 11:25:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:23,054 INFO L225 Difference]: With dead ends: 616 [2021-11-06 11:25:23,055 INFO L226 Difference]: Without dead ends: 352 [2021-11-06 11:25:23,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:25:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-06 11:25:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 298. [2021-11-06 11:25:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 284 states have (on average 1.323943661971831) internal successors, (376), 297 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 376 transitions. [2021-11-06 11:25:23,064 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 376 transitions. Word has length 57 [2021-11-06 11:25:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 376 transitions. [2021-11-06 11:25:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 376 transitions. [2021-11-06 11:25:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 11:25:23,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:23,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:23,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 11:25:23,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1155910083, now seen corresponding path program 1 times [2021-11-06 11:25:23,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:23,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262605884] [2021-11-06 11:25:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:23,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:23,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:23,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262605884] [2021-11-06 11:25:23,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262605884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:23,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:25:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882848854] [2021-11-06 11:25:23,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:25:23,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:25:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:25:23,186 INFO L87 Difference]: Start difference. First operand 298 states and 376 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:23,401 INFO L93 Difference]: Finished difference Result 702 states and 869 transitions. [2021-11-06 11:25:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:25:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-06 11:25:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:23,403 INFO L225 Difference]: With dead ends: 702 [2021-11-06 11:25:23,403 INFO L226 Difference]: Without dead ends: 437 [2021-11-06 11:25:23,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:25:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-06 11:25:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 300. [2021-11-06 11:25:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 286 states have (on average 1.3216783216783217) internal successors, (378), 299 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 378 transitions. [2021-11-06 11:25:23,410 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 378 transitions. Word has length 59 [2021-11-06 11:25:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:23,411 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 378 transitions. [2021-11-06 11:25:23,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 378 transitions. [2021-11-06 11:25:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-06 11:25:23,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:23,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:23,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 11:25:23,412 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1929169454, now seen corresponding path program 1 times [2021-11-06 11:25:23,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:23,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534878329] [2021-11-06 11:25:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:23,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:23,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:23,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534878329] [2021-11-06 11:25:23,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534878329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:23,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:23,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:25:23,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56033518] [2021-11-06 11:25:23,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:25:23,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:25:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:25:23,498 INFO L87 Difference]: Start difference. First operand 300 states and 378 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:23,741 INFO L93 Difference]: Finished difference Result 830 states and 1021 transitions. [2021-11-06 11:25:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:25:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-06 11:25:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:23,745 INFO L225 Difference]: With dead ends: 830 [2021-11-06 11:25:23,745 INFO L226 Difference]: Without dead ends: 564 [2021-11-06 11:25:23,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:25:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-06 11:25:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 302. [2021-11-06 11:25:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 288 states have (on average 1.3194444444444444) internal successors, (380), 301 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 380 transitions. [2021-11-06 11:25:23,754 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 380 transitions. Word has length 60 [2021-11-06 11:25:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:23,754 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 380 transitions. [2021-11-06 11:25:23,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 380 transitions. [2021-11-06 11:25:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 11:25:23,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:23,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:23,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 11:25:23,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1929551887, now seen corresponding path program 1 times [2021-11-06 11:25:23,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:23,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738296109] [2021-11-06 11:25:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:23,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:23,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:23,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738296109] [2021-11-06 11:25:23,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738296109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:23,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:23,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 11:25:23,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121763973] [2021-11-06 11:25:23,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 11:25:23,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 11:25:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:25:23,951 INFO L87 Difference]: Start difference. First operand 302 states and 380 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:26,271 INFO L93 Difference]: Finished difference Result 1679 states and 1985 transitions. [2021-11-06 11:25:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 11:25:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 11:25:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:26,276 INFO L225 Difference]: With dead ends: 1679 [2021-11-06 11:25:26,277 INFO L226 Difference]: Without dead ends: 1404 [2021-11-06 11:25:26,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2021-11-06 11:25:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-06 11:25:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 338. [2021-11-06 11:25:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 324 states have (on average 1.345679012345679) internal successors, (436), 337 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 436 transitions. [2021-11-06 11:25:26,295 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 436 transitions. Word has length 65 [2021-11-06 11:25:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:26,295 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 436 transitions. [2021-11-06 11:25:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 436 transitions. [2021-11-06 11:25:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 11:25:26,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:26,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:26,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 11:25:26,297 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash -900192589, now seen corresponding path program 1 times [2021-11-06 11:25:26,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:26,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153181157] [2021-11-06 11:25:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:26,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:26,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:26,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153181157] [2021-11-06 11:25:26,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153181157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:26,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:26,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:25:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544870183] [2021-11-06 11:25:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:25:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:25:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:25:26,390 INFO L87 Difference]: Start difference. First operand 338 states and 436 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:26,599 INFO L93 Difference]: Finished difference Result 765 states and 969 transitions. [2021-11-06 11:25:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:25:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 11:25:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:26,602 INFO L225 Difference]: With dead ends: 765 [2021-11-06 11:25:26,602 INFO L226 Difference]: Without dead ends: 493 [2021-11-06 11:25:26,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:25:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-06 11:25:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 338. [2021-11-06 11:25:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 324 states have (on average 1.3364197530864197) internal successors, (433), 337 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 433 transitions. [2021-11-06 11:25:26,617 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 433 transitions. Word has length 65 [2021-11-06 11:25:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:26,617 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 433 transitions. [2021-11-06 11:25:26,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 433 transitions. [2021-11-06 11:25:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-06 11:25:26,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:26,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:26,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 11:25:26,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1655542961, now seen corresponding path program 1 times [2021-11-06 11:25:26,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:26,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589979239] [2021-11-06 11:25:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:26,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:26,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:26,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589979239] [2021-11-06 11:25:26,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589979239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:26,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:26,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:25:26,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189247542] [2021-11-06 11:25:26,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:25:26,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:25:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:25:26,706 INFO L87 Difference]: Start difference. First operand 338 states and 433 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:27,050 INFO L93 Difference]: Finished difference Result 966 states and 1202 transitions. [2021-11-06 11:25:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:25:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-06 11:25:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:27,052 INFO L225 Difference]: With dead ends: 966 [2021-11-06 11:25:27,053 INFO L226 Difference]: Without dead ends: 693 [2021-11-06 11:25:27,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:25:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-06 11:25:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 338. [2021-11-06 11:25:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 324 states have (on average 1.3271604938271604) internal successors, (430), 337 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 430 transitions. [2021-11-06 11:25:27,067 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 430 transitions. Word has length 67 [2021-11-06 11:25:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 430 transitions. [2021-11-06 11:25:27,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 430 transitions. [2021-11-06 11:25:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 11:25:27,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:27,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 11:25:27,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1465083877, now seen corresponding path program 1 times [2021-11-06 11:25:27,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:27,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280078073] [2021-11-06 11:25:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:27,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:27,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:27,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280078073] [2021-11-06 11:25:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280078073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:27,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:25:27,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839987330] [2021-11-06 11:25:27,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:25:27,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:25:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:25:27,183 INFO L87 Difference]: Start difference. First operand 338 states and 430 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:27,516 INFO L93 Difference]: Finished difference Result 969 states and 1200 transitions. [2021-11-06 11:25:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:25:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-06 11:25:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:27,519 INFO L225 Difference]: With dead ends: 969 [2021-11-06 11:25:27,519 INFO L226 Difference]: Without dead ends: 696 [2021-11-06 11:25:27,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:25:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-06 11:25:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 338. [2021-11-06 11:25:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 324 states have (on average 1.3179012345679013) internal successors, (427), 337 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 427 transitions. [2021-11-06 11:25:27,534 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 427 transitions. Word has length 68 [2021-11-06 11:25:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:27,534 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 427 transitions. [2021-11-06 11:25:27,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 427 transitions. [2021-11-06 11:25:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 11:25:27,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:27,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:27,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 11:25:27,536 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1833549603, now seen corresponding path program 1 times [2021-11-06 11:25:27,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:27,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405655837] [2021-11-06 11:25:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:27,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:27,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:27,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405655837] [2021-11-06 11:25:27,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405655837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:27,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:27,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:25:27,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891169767] [2021-11-06 11:25:27,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:25:27,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:25:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:25:27,603 INFO L87 Difference]: Start difference. First operand 338 states and 427 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:27,689 INFO L93 Difference]: Finished difference Result 678 states and 861 transitions. [2021-11-06 11:25:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:25:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-06 11:25:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:27,692 INFO L225 Difference]: With dead ends: 678 [2021-11-06 11:25:27,692 INFO L226 Difference]: Without dead ends: 370 [2021-11-06 11:25:27,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-06 11:25:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 354. [2021-11-06 11:25:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 340 states have (on average 1.3029411764705883) internal successors, (443), 353 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2021-11-06 11:25:27,706 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 73 [2021-11-06 11:25:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2021-11-06 11:25:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2021-11-06 11:25:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 11:25:27,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:27,708 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:27,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 11:25:27,708 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1974098213, now seen corresponding path program 1 times [2021-11-06 11:25:27,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:27,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036583136] [2021-11-06 11:25:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:27,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:27,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:27,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036583136] [2021-11-06 11:25:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036583136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:27,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:27,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:25:27,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086936311] [2021-11-06 11:25:27,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:25:27,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:25:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:25:27,804 INFO L87 Difference]: Start difference. First operand 354 states and 443 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:28,206 INFO L93 Difference]: Finished difference Result 998 states and 1226 transitions. [2021-11-06 11:25:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 11:25:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-06 11:25:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:28,209 INFO L225 Difference]: With dead ends: 998 [2021-11-06 11:25:28,209 INFO L226 Difference]: Without dead ends: 703 [2021-11-06 11:25:28,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:25:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-06 11:25:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 354. [2021-11-06 11:25:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 340 states have (on average 1.2941176470588236) internal successors, (440), 353 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 440 transitions. [2021-11-06 11:25:28,224 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 440 transitions. Word has length 73 [2021-11-06 11:25:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:28,224 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 440 transitions. [2021-11-06 11:25:28,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 440 transitions. [2021-11-06 11:25:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 11:25:28,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:28,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:28,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 11:25:28,225 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -89678431, now seen corresponding path program 1 times [2021-11-06 11:25:28,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:28,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918983692] [2021-11-06 11:25:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:28,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:25:28,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:28,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918983692] [2021-11-06 11:25:28,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918983692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:28,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:25:28,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:25:28,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687581959] [2021-11-06 11:25:28,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:25:28,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:25:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:25:28,299 INFO L87 Difference]: Start difference. First operand 354 states and 440 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:28,485 INFO L93 Difference]: Finished difference Result 907 states and 1096 transitions. [2021-11-06 11:25:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:25:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-06 11:25:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:28,488 INFO L225 Difference]: With dead ends: 907 [2021-11-06 11:25:28,488 INFO L226 Difference]: Without dead ends: 591 [2021-11-06 11:25:28,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:25:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-06 11:25:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 354. [2021-11-06 11:25:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 353 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 438 transitions. [2021-11-06 11:25:28,505 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 438 transitions. Word has length 73 [2021-11-06 11:25:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 438 transitions. [2021-11-06 11:25:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 438 transitions. [2021-11-06 11:25:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 11:25:28,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:28,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:28,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 11:25:28,507 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 565207681, now seen corresponding path program 1 times [2021-11-06 11:25:28,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:28,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678966019] [2021-11-06 11:25:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:28,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:25:28,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:28,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678966019] [2021-11-06 11:25:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678966019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:25:28,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007375944] [2021-11-06 11:25:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:28,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:25:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:25:28,635 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) [2021-11-06 11:25:28,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 11:25:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 11:25:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:25:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:25:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007375944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:25:29,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:25:29,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-06 11:25:29,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256368737] [2021-11-06 11:25:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:25:29,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:25:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:25:29,360 INFO L87 Difference]: Start difference. First operand 354 states and 438 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:25:29,991 INFO L93 Difference]: Finished difference Result 1069 states and 1279 transitions. [2021-11-06 11:25:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 11:25:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 11:25:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:25:29,994 INFO L225 Difference]: With dead ends: 1069 [2021-11-06 11:25:29,994 INFO L226 Difference]: Without dead ends: 751 [2021-11-06 11:25:29,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-06 11:25:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-11-06 11:25:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 354. [2021-11-06 11:25:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 340 states have (on average 1.2823529411764707) internal successors, (436), 353 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 436 transitions. [2021-11-06 11:25:30,009 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 436 transitions. Word has length 77 [2021-11-06 11:25:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:25:30,010 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 436 transitions. [2021-11-06 11:25:30,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:25:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 436 transitions. [2021-11-06 11:25:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:25:30,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:25:30,011 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:25:30,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 11:25:30,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 11:25:30,232 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:25:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:25:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1475756772, now seen corresponding path program 1 times [2021-11-06 11:25:30,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:25:30,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361214336] [2021-11-06 11:25:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:30,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:25:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:25:30,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:25:30,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361214336] [2021-11-06 11:25:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361214336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:25:30,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721433635] [2021-11-06 11:25:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:25:30,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:25:30,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:25:30,575 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) [2021-11-06 11:25:30,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 11:25:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:25:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-06 11:25:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:25:30,941 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-06 11:25:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-06 11:25:30,956 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-06 11:25:30,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-06 11:25:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:25:38,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721433635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:25:38,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:25:38,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-11-06 11:25:38,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544855963] [2021-11-06 11:25:38,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-06 11:25:38,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:25:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-06 11:25:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-11-06 11:25:38,878 INFO L87 Difference]: Start difference. First operand 354 states and 436 transitions. Second operand has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:55,921 INFO L93 Difference]: Finished difference Result 1652 states and 2003 transitions. [2021-11-06 11:26:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-06 11:26:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:55,926 INFO L225 Difference]: With dead ends: 1652 [2021-11-06 11:26:55,926 INFO L226 Difference]: Without dead ends: 1423 [2021-11-06 11:26:55,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=1153, Invalid=6679, Unknown=0, NotChecked=0, Total=7832 [2021-11-06 11:26:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-11-06 11:26:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 526. [2021-11-06 11:26:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 512 states have (on average 1.27734375) internal successors, (654), 525 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 654 transitions. [2021-11-06 11:26:55,961 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 654 transitions. Word has length 79 [2021-11-06 11:26:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:55,962 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 654 transitions. [2021-11-06 11:26:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 654 transitions. [2021-11-06 11:26:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:26:55,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:55,963 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:55,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 11:26:56,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 11:26:56,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 378673426, now seen corresponding path program 1 times [2021-11-06 11:26:56,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:56,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202351235] [2021-11-06 11:26:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:56,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:26:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:26:56,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:26:56,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202351235] [2021-11-06 11:26:56,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202351235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:26:56,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:26:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:26:56,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95032998] [2021-11-06 11:26:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:26:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:26:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:26:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:26:56,368 INFO L87 Difference]: Start difference. First operand 526 states and 654 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:56,887 INFO L93 Difference]: Finished difference Result 1086 states and 1344 transitions. [2021-11-06 11:26:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:26:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:56,890 INFO L225 Difference]: With dead ends: 1086 [2021-11-06 11:26:56,890 INFO L226 Difference]: Without dead ends: 771 [2021-11-06 11:26:56,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:26:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-06 11:26:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 526. [2021-11-06 11:26:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 512 states have (on average 1.2734375) internal successors, (652), 525 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 652 transitions. [2021-11-06 11:26:56,924 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 652 transitions. Word has length 79 [2021-11-06 11:26:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:56,924 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 652 transitions. [2021-11-06 11:26:56,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 652 transitions. [2021-11-06 11:26:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:26:56,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:56,925 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:56,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 11:26:56,926 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2078239348, now seen corresponding path program 1 times [2021-11-06 11:26:56,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:56,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397397747] [2021-11-06 11:26:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:56,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:26:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:26:57,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:26:57,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397397747] [2021-11-06 11:26:57,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397397747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:26:57,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:26:57,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:26:57,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886330004] [2021-11-06 11:26:57,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:26:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:26:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:26:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:26:57,163 INFO L87 Difference]: Start difference. First operand 526 states and 652 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:57,669 INFO L93 Difference]: Finished difference Result 1018 states and 1271 transitions. [2021-11-06 11:26:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:26:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:57,672 INFO L225 Difference]: With dead ends: 1018 [2021-11-06 11:26:57,672 INFO L226 Difference]: Without dead ends: 713 [2021-11-06 11:26:57,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:26:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-06 11:26:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 526. [2021-11-06 11:26:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 512 states have (on average 1.26953125) internal successors, (650), 525 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 650 transitions. [2021-11-06 11:26:57,706 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 650 transitions. Word has length 79 [2021-11-06 11:26:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:57,706 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 650 transitions. [2021-11-06 11:26:57,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 650 transitions. [2021-11-06 11:26:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:26:57,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:57,707 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:57,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 11:26:57,708 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2076392306, now seen corresponding path program 1 times [2021-11-06 11:26:57,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:57,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336916725] [2021-11-06 11:26:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:57,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:26:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:26:57,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:26:57,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336916725] [2021-11-06 11:26:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336916725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:26:57,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:26:57,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 11:26:57,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578722226] [2021-11-06 11:26:57,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:26:57,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:26:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:26:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:26:57,925 INFO L87 Difference]: Start difference. First operand 526 states and 650 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:58,594 INFO L93 Difference]: Finished difference Result 1048 states and 1302 transitions. [2021-11-06 11:26:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 11:26:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:58,599 INFO L225 Difference]: With dead ends: 1048 [2021-11-06 11:26:58,599 INFO L226 Difference]: Without dead ends: 741 [2021-11-06 11:26:58,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-06 11:26:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-06 11:26:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 526. [2021-11-06 11:26:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 512 states have (on average 1.265625) internal successors, (648), 525 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 648 transitions. [2021-11-06 11:26:58,638 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 648 transitions. Word has length 79 [2021-11-06 11:26:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 648 transitions. [2021-11-06 11:26:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 648 transitions. [2021-11-06 11:26:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:26:58,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:58,640 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:58,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-06 11:26:58,641 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash -301384944, now seen corresponding path program 1 times [2021-11-06 11:26:58,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:58,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146750934] [2021-11-06 11:26:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:58,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:26:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:26:58,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:26:58,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146750934] [2021-11-06 11:26:58,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146750934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:26:58,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:26:58,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:26:58,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145008491] [2021-11-06 11:26:58,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:26:58,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:26:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:26:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:26:58,872 INFO L87 Difference]: Start difference. First operand 526 states and 648 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:59,481 INFO L93 Difference]: Finished difference Result 1024 states and 1273 transitions. [2021-11-06 11:26:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:26:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:59,486 INFO L225 Difference]: With dead ends: 1024 [2021-11-06 11:26:59,486 INFO L226 Difference]: Without dead ends: 713 [2021-11-06 11:26:59,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:26:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-06 11:26:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 526. [2021-11-06 11:26:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 512 states have (on average 1.26171875) internal successors, (646), 525 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 646 transitions. [2021-11-06 11:26:59,524 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 646 transitions. Word has length 79 [2021-11-06 11:26:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:59,525 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 646 transitions. [2021-11-06 11:26:59,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 646 transitions. [2021-11-06 11:26:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 11:26:59,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:59,526 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:59,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-06 11:26:59,526 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1079738004, now seen corresponding path program 1 times [2021-11-06 11:26:59,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:59,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042941286] [2021-11-06 11:26:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:26:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:26:59,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:26:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042941286] [2021-11-06 11:26:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042941286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:26:59,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:26:59,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:26:59,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795535460] [2021-11-06 11:26:59,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:26:59,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:26:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:26:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:26:59,636 INFO L87 Difference]: Start difference. First operand 526 states and 646 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:26:59,915 INFO L93 Difference]: Finished difference Result 1006 states and 1253 transitions. [2021-11-06 11:26:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:26:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 11:26:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:26:59,918 INFO L225 Difference]: With dead ends: 1006 [2021-11-06 11:26:59,918 INFO L226 Difference]: Without dead ends: 687 [2021-11-06 11:26:59,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:26:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-06 11:26:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 508. [2021-11-06 11:26:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 494 states have (on average 1.2611336032388665) internal successors, (623), 507 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 623 transitions. [2021-11-06 11:26:59,952 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 623 transitions. Word has length 79 [2021-11-06 11:26:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:26:59,952 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 623 transitions. [2021-11-06 11:26:59,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:26:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 623 transitions. [2021-11-06 11:26:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 11:26:59,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:26:59,953 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:26:59,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-06 11:26:59,954 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:26:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:26:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1446027407, now seen corresponding path program 1 times [2021-11-06 11:26:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:26:59,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226311882] [2021-11-06 11:26:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:26:59,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:26:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:00,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:00,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226311882] [2021-11-06 11:27:00,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226311882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:00,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:00,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:00,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349733825] [2021-11-06 11:27:00,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:00,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:00,069 INFO L87 Difference]: Start difference. First operand 508 states and 623 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:00,512 INFO L93 Difference]: Finished difference Result 1251 states and 1528 transitions. [2021-11-06 11:27:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 11:27:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-06 11:27:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:00,515 INFO L225 Difference]: With dead ends: 1251 [2021-11-06 11:27:00,515 INFO L226 Difference]: Without dead ends: 948 [2021-11-06 11:27:00,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-11-06 11:27:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-06 11:27:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 508. [2021-11-06 11:27:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 494 states have (on average 1.2530364372469636) internal successors, (619), 507 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 619 transitions. [2021-11-06 11:27:00,547 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 619 transitions. Word has length 81 [2021-11-06 11:27:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:00,548 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 619 transitions. [2021-11-06 11:27:00,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 619 transitions. [2021-11-06 11:27:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 11:27:00,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:00,549 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:00,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-06 11:27:00,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1562028301, now seen corresponding path program 1 times [2021-11-06 11:27:00,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:00,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667351447] [2021-11-06 11:27:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:00,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:00,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:00,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667351447] [2021-11-06 11:27:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667351447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:00,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:00,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:00,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839828188] [2021-11-06 11:27:00,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:00,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:00,659 INFO L87 Difference]: Start difference. First operand 508 states and 619 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:01,214 INFO L93 Difference]: Finished difference Result 1570 states and 1897 transitions. [2021-11-06 11:27:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 11:27:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 11:27:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:01,218 INFO L225 Difference]: With dead ends: 1570 [2021-11-06 11:27:01,218 INFO L226 Difference]: Without dead ends: 1265 [2021-11-06 11:27:01,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-06 11:27:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-11-06 11:27:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 508. [2021-11-06 11:27:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 494 states have (on average 1.2449392712550607) internal successors, (615), 507 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 615 transitions. [2021-11-06 11:27:01,254 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 615 transitions. Word has length 83 [2021-11-06 11:27:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:01,255 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 615 transitions. [2021-11-06 11:27:01,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 615 transitions. [2021-11-06 11:27:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 11:27:01,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:01,256 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:01,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-06 11:27:01,256 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash -178185581, now seen corresponding path program 1 times [2021-11-06 11:27:01,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:01,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608365014] [2021-11-06 11:27:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:01,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:01,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:01,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608365014] [2021-11-06 11:27:01,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608365014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:01,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:01,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:01,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38712801] [2021-11-06 11:27:01,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:01,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:01,372 INFO L87 Difference]: Start difference. First operand 508 states and 615 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:01,986 INFO L93 Difference]: Finished difference Result 1572 states and 1892 transitions. [2021-11-06 11:27:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 11:27:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-06 11:27:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:01,990 INFO L225 Difference]: With dead ends: 1572 [2021-11-06 11:27:01,991 INFO L226 Difference]: Without dead ends: 1267 [2021-11-06 11:27:01,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-11-06 11:27:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-06 11:27:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 453. [2021-11-06 11:27:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 439 states have (on average 1.2232346241457859) internal successors, (537), 452 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 537 transitions. [2021-11-06 11:27:02,024 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 537 transitions. Word has length 84 [2021-11-06 11:27:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 537 transitions. [2021-11-06 11:27:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 537 transitions. [2021-11-06 11:27:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 11:27:02,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:02,026 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:02,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-06 11:27:02,027 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -918714283, now seen corresponding path program 1 times [2021-11-06 11:27:02,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:02,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103641460] [2021-11-06 11:27:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:02,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:27:02,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:02,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103641460] [2021-11-06 11:27:02,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103641460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:02,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:02,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:27:02,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970013892] [2021-11-06 11:27:02,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:27:02,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:27:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:27:02,085 INFO L87 Difference]: Start difference. First operand 453 states and 537 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:02,228 INFO L93 Difference]: Finished difference Result 1024 states and 1213 transitions. [2021-11-06 11:27:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:27:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-06 11:27:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:02,231 INFO L225 Difference]: With dead ends: 1024 [2021-11-06 11:27:02,231 INFO L226 Difference]: Without dead ends: 601 [2021-11-06 11:27:02,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:27:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-06 11:27:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 431. [2021-11-06 11:27:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 417 states have (on average 1.1942446043165467) internal successors, (498), 430 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 498 transitions. [2021-11-06 11:27:02,261 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 498 transitions. Word has length 88 [2021-11-06 11:27:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:02,261 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 498 transitions. [2021-11-06 11:27:02,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 498 transitions. [2021-11-06 11:27:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 11:27:02,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:02,262 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-06 11:27:02,263 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1288449745, now seen corresponding path program 1 times [2021-11-06 11:27:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:02,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094884386] [2021-11-06 11:27:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:02,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:27:02,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:02,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094884386] [2021-11-06 11:27:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094884386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:02,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045357181] [2021-11-06 11:27:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:02,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:02,631 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) [2021-11-06 11:27:02,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 11:27:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:02,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-06 11:27:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:03,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-06 11:27:03,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:03,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-06 11:27:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-06 11:27:04,391 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-06 11:27:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 19 [2021-11-06 11:27:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:27:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045357181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:04,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:27:04,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-06 11:27:04,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573335214] [2021-11-06 11:27:04,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 11:27:04,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 11:27:04,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-11-06 11:27:04,463 INFO L87 Difference]: Start difference. First operand 431 states and 498 transitions. Second operand has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:08,208 INFO L93 Difference]: Finished difference Result 1505 states and 1754 transitions. [2021-11-06 11:27:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 11:27:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-06 11:27:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:08,211 INFO L225 Difference]: With dead ends: 1505 [2021-11-06 11:27:08,212 INFO L226 Difference]: Without dead ends: 1183 [2021-11-06 11:27:08,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2021-11-06 11:27:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-06 11:27:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 509. [2021-11-06 11:27:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 495 states have (on average 1.1696969696969697) internal successors, (579), 508 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 579 transitions. [2021-11-06 11:27:08,255 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 579 transitions. Word has length 88 [2021-11-06 11:27:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:08,255 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 579 transitions. [2021-11-06 11:27:08,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 579 transitions. [2021-11-06 11:27:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 11:27:08,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:08,257 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:08,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:08,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:08,475 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2015935427, now seen corresponding path program 1 times [2021-11-06 11:27:08,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:08,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925961031] [2021-11-06 11:27:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:08,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:08,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:08,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925961031] [2021-11-06 11:27:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925961031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:08,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:08,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-06 11:27:08,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969315892] [2021-11-06 11:27:08,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 11:27:08,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 11:27:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:27:08,775 INFO L87 Difference]: Start difference. First operand 509 states and 579 transitions. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:10,833 INFO L93 Difference]: Finished difference Result 1594 states and 1840 transitions. [2021-11-06 11:27:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-06 11:27:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 11:27:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:10,837 INFO L225 Difference]: With dead ends: 1594 [2021-11-06 11:27:10,838 INFO L226 Difference]: Without dead ends: 1356 [2021-11-06 11:27:10,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=411, Invalid=1071, Unknown=0, NotChecked=0, Total=1482 [2021-11-06 11:27:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-11-06 11:27:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 518. [2021-11-06 11:27:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 504 states have (on average 1.1666666666666667) internal successors, (588), 517 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 588 transitions. [2021-11-06 11:27:10,886 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 588 transitions. Word has length 89 [2021-11-06 11:27:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:10,886 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 588 transitions. [2021-11-06 11:27:10,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 588 transitions. [2021-11-06 11:27:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 11:27:10,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:10,888 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:10,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-06 11:27:10,888 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -568652721, now seen corresponding path program 1 times [2021-11-06 11:27:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:10,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839892546] [2021-11-06 11:27:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:10,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:11,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:11,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839892546] [2021-11-06 11:27:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839892546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:11,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:11,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:11,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271150718] [2021-11-06 11:27:11,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:11,174 INFO L87 Difference]: Start difference. First operand 518 states and 588 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:11,726 INFO L93 Difference]: Finished difference Result 872 states and 1006 transitions. [2021-11-06 11:27:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:27:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 11:27:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:11,728 INFO L225 Difference]: With dead ends: 872 [2021-11-06 11:27:11,728 INFO L226 Difference]: Without dead ends: 688 [2021-11-06 11:27:11,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:27:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-11-06 11:27:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 518. [2021-11-06 11:27:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 504 states have (on average 1.1646825396825398) internal successors, (587), 517 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 587 transitions. [2021-11-06 11:27:11,777 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 587 transitions. Word has length 90 [2021-11-06 11:27:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:11,778 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 587 transitions. [2021-11-06 11:27:11,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 587 transitions. [2021-11-06 11:27:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 11:27:11,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:11,779 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:11,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-06 11:27:11,779 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1949460171, now seen corresponding path program 1 times [2021-11-06 11:27:11,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:11,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328636982] [2021-11-06 11:27:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:11,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:12,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328636982] [2021-11-06 11:27:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328636982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:12,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:12,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:27:12,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972708419] [2021-11-06 11:27:12,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:27:12,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:27:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:27:12,044 INFO L87 Difference]: Start difference. First operand 518 states and 587 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:12,515 INFO L93 Difference]: Finished difference Result 868 states and 1001 transitions. [2021-11-06 11:27:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:27:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 11:27:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:12,517 INFO L225 Difference]: With dead ends: 868 [2021-11-06 11:27:12,517 INFO L226 Difference]: Without dead ends: 687 [2021-11-06 11:27:12,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:27:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-06 11:27:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 518. [2021-11-06 11:27:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 504 states have (on average 1.1626984126984128) internal successors, (586), 517 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 586 transitions. [2021-11-06 11:27:12,579 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 586 transitions. Word has length 90 [2021-11-06 11:27:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:12,579 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 586 transitions. [2021-11-06 11:27:12,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 586 transitions. [2021-11-06 11:27:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 11:27:12,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:12,580 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:12,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-06 11:27:12,581 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1951307213, now seen corresponding path program 1 times [2021-11-06 11:27:12,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:12,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763585975] [2021-11-06 11:27:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:12,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:12,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763585975] [2021-11-06 11:27:12,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763585975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:12,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:12,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:12,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720414689] [2021-11-06 11:27:12,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:12,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:12,926 INFO L87 Difference]: Start difference. First operand 518 states and 586 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:13,389 INFO L93 Difference]: Finished difference Result 869 states and 1001 transitions. [2021-11-06 11:27:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:27:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 11:27:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:13,391 INFO L225 Difference]: With dead ends: 869 [2021-11-06 11:27:13,391 INFO L226 Difference]: Without dead ends: 687 [2021-11-06 11:27:13,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:27:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-06 11:27:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 518. [2021-11-06 11:27:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 504 states have (on average 1.1607142857142858) internal successors, (585), 517 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 585 transitions. [2021-11-06 11:27:13,434 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 585 transitions. Word has length 90 [2021-11-06 11:27:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:13,435 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 585 transitions. [2021-11-06 11:27:13,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 585 transitions. [2021-11-06 11:27:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 11:27:13,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:13,436 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:13,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-06 11:27:13,437 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash 111405649, now seen corresponding path program 1 times [2021-11-06 11:27:13,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:13,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106546973] [2021-11-06 11:27:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:13,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:13,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:13,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106546973] [2021-11-06 11:27:13,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106546973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:13,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:13,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:27:13,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738301241] [2021-11-06 11:27:13,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:27:13,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:27:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:27:13,551 INFO L87 Difference]: Start difference. First operand 518 states and 585 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:14,137 INFO L93 Difference]: Finished difference Result 868 states and 999 transitions. [2021-11-06 11:27:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 11:27:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 11:27:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:14,139 INFO L225 Difference]: With dead ends: 868 [2021-11-06 11:27:14,139 INFO L226 Difference]: Without dead ends: 680 [2021-11-06 11:27:14,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:27:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-06 11:27:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 511. [2021-11-06 11:27:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 497 states have (on average 1.158953722334004) internal successors, (576), 510 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 576 transitions. [2021-11-06 11:27:14,182 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 576 transitions. Word has length 90 [2021-11-06 11:27:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:14,182 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 576 transitions. [2021-11-06 11:27:14,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 576 transitions. [2021-11-06 11:27:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-06 11:27:14,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:14,183 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-06 11:27:14,184 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1079568069, now seen corresponding path program 1 times [2021-11-06 11:27:14,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:14,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326671985] [2021-11-06 11:27:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:14,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:14,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:14,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326671985] [2021-11-06 11:27:14,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326671985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:14,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117172298] [2021-11-06 11:27:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:14,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:14,312 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) [2021-11-06 11:27:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 11:27:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-06 11:27:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:15,003 INFO L354 Elim1Store]: treesize reduction 157, result has 15.1 percent of original size [2021-11-06 11:27:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2021-11-06 11:27:15,031 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-06 11:27:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2021-11-06 11:27:15,961 INFO L354 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2021-11-06 11:27:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 102 [2021-11-06 11:27:15,994 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-06 11:27:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 75 [2021-11-06 11:27:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117172298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:16,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:27:16,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-11-06 11:27:16,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917693807] [2021-11-06 11:27:16,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 11:27:16,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 11:27:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:27:16,029 INFO L87 Difference]: Start difference. First operand 511 states and 576 transitions. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:28,642 INFO L93 Difference]: Finished difference Result 2068 states and 2291 transitions. [2021-11-06 11:27:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-06 11:27:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-06 11:27:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:28,646 INFO L225 Difference]: With dead ends: 2068 [2021-11-06 11:27:28,647 INFO L226 Difference]: Without dead ends: 1832 [2021-11-06 11:27:28,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=915, Invalid=3245, Unknown=0, NotChecked=0, Total=4160 [2021-11-06 11:27:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-06 11:27:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 530. [2021-11-06 11:27:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 516 states have (on average 1.1608527131782946) internal successors, (599), 529 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 599 transitions. [2021-11-06 11:27:28,703 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 599 transitions. Word has length 91 [2021-11-06 11:27:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:28,703 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 599 transitions. [2021-11-06 11:27:28,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 599 transitions. [2021-11-06 11:27:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:27:28,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:28,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:28,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:28,915 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash 106923265, now seen corresponding path program 1 times [2021-11-06 11:27:28,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:28,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431859202] [2021-11-06 11:27:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:28,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 11:27:29,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:29,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431859202] [2021-11-06 11:27:29,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431859202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:29,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:29,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:27:29,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104277921] [2021-11-06 11:27:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:27:29,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:27:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:27:29,010 INFO L87 Difference]: Start difference. First operand 530 states and 599 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:29,348 INFO L93 Difference]: Finished difference Result 859 states and 974 transitions. [2021-11-06 11:27:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:27:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:27:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:29,350 INFO L225 Difference]: With dead ends: 859 [2021-11-06 11:27:29,350 INFO L226 Difference]: Without dead ends: 847 [2021-11-06 11:27:29,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:27:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-06 11:27:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 558. [2021-11-06 11:27:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 544 states have (on average 1.1525735294117647) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2021-11-06 11:27:29,406 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 92 [2021-11-06 11:27:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:29,406 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2021-11-06 11:27:29,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2021-11-06 11:27:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:27:29,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:29,408 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:29,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-06 11:27:29,408 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash -592319472, now seen corresponding path program 1 times [2021-11-06 11:27:29,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:29,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62077197] [2021-11-06 11:27:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:29,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:29,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:29,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62077197] [2021-11-06 11:27:29,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62077197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:29,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:27:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532308097] [2021-11-06 11:27:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:27:29,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:27:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:27:29,520 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:30,032 INFO L93 Difference]: Finished difference Result 1181 states and 1351 transitions. [2021-11-06 11:27:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 11:27:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:27:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:30,039 INFO L225 Difference]: With dead ends: 1181 [2021-11-06 11:27:30,040 INFO L226 Difference]: Without dead ends: 967 [2021-11-06 11:27:30,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:27:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-06 11:27:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 558. [2021-11-06 11:27:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 544 states have (on average 1.150735294117647) internal successors, (626), 557 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 626 transitions. [2021-11-06 11:27:30,098 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 626 transitions. Word has length 92 [2021-11-06 11:27:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:30,099 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 626 transitions. [2021-11-06 11:27:30,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 626 transitions. [2021-11-06 11:27:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:27:30,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:30,100 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:30,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-06 11:27:30,100 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 44757236, now seen corresponding path program 1 times [2021-11-06 11:27:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:30,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603074893] [2021-11-06 11:27:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:30,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:30,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603074893] [2021-11-06 11:27:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603074893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018083734] [2021-11-06 11:27:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:30,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:30,392 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) [2021-11-06 11:27:30,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 11:27:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-06 11:27:30,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-06 11:27:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:31,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-06 11:27:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 11:27:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018083734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:32,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:27:32,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13] total 22 [2021-11-06 11:27:32,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548755324] [2021-11-06 11:27:32,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 11:27:32,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 11:27:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-06 11:27:32,046 INFO L87 Difference]: Start difference. First operand 558 states and 626 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:35,398 INFO L93 Difference]: Finished difference Result 1632 states and 1862 transitions. [2021-11-06 11:27:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-06 11:27:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:27:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:35,402 INFO L225 Difference]: With dead ends: 1632 [2021-11-06 11:27:35,402 INFO L226 Difference]: Without dead ends: 1630 [2021-11-06 11:27:35,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1652, Invalid=7854, Unknown=0, NotChecked=0, Total=9506 [2021-11-06 11:27:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-11-06 11:27:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 556. [2021-11-06 11:27:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 543 states have (on average 1.147329650092081) internal successors, (623), 555 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 623 transitions. [2021-11-06 11:27:35,466 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 623 transitions. Word has length 97 [2021-11-06 11:27:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 623 transitions. [2021-11-06 11:27:35,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 623 transitions. [2021-11-06 11:27:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:27:35,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:35,468 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:35,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:35,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-06 11:27:35,684 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash -212752875, now seen corresponding path program 1 times [2021-11-06 11:27:35,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:35,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456587790] [2021-11-06 11:27:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:35,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:35,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:35,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456587790] [2021-11-06 11:27:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456587790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613016792] [2021-11-06 11:27:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:35,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:35,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:35,874 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) [2021-11-06 11:27:35,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 11:27:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-06 11:27:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:36,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-06 11:27:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-06 11:27:37,284 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-06 11:27:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 84 [2021-11-06 11:27:37,295 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-06 11:27:37,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 32 [2021-11-06 11:27:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:37,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613016792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:37,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:27:37,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-11-06 11:27:37,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701620086] [2021-11-06 11:27:37,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-06 11:27:37,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-06 11:27:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-06 11:27:37,319 INFO L87 Difference]: Start difference. First operand 556 states and 623 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 18 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:40,713 INFO L93 Difference]: Finished difference Result 1647 states and 1885 transitions. [2021-11-06 11:27:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-06 11:27:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 18 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:27:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:40,716 INFO L225 Difference]: With dead ends: 1647 [2021-11-06 11:27:40,717 INFO L226 Difference]: Without dead ends: 1352 [2021-11-06 11:27:40,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=563, Invalid=1987, Unknown=0, NotChecked=0, Total=2550 [2021-11-06 11:27:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-06 11:27:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 568. [2021-11-06 11:27:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 555 states have (on average 1.1495495495495496) internal successors, (638), 567 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 638 transitions. [2021-11-06 11:27:40,768 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 638 transitions. Word has length 97 [2021-11-06 11:27:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:40,768 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 638 transitions. [2021-11-06 11:27:40,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 18 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 638 transitions. [2021-11-06 11:27:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:27:40,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:40,770 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:40,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:40,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-06 11:27:40,984 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1022099501, now seen corresponding path program 1 times [2021-11-06 11:27:40,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:40,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724976513] [2021-11-06 11:27:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:40,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:41,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:41,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724976513] [2021-11-06 11:27:41,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724976513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:41,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955760949] [2021-11-06 11:27:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:41,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:41,269 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) [2021-11-06 11:27:41,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 11:27:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-06 11:27:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-06 11:27:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-06 11:27:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-06 11:27:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 19 [2021-11-06 11:27:42,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-11-06 11:27:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:27:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955760949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:42,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:27:42,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-11-06 11:27:42,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286265373] [2021-11-06 11:27:42,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 11:27:42,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 11:27:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:27:42,672 INFO L87 Difference]: Start difference. First operand 568 states and 638 transitions. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:43,784 INFO L93 Difference]: Finished difference Result 1145 states and 1306 transitions. [2021-11-06 11:27:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 11:27:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:27:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:43,786 INFO L225 Difference]: With dead ends: 1145 [2021-11-06 11:27:43,786 INFO L226 Difference]: Without dead ends: 840 [2021-11-06 11:27:43,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-06 11:27:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-06 11:27:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 536. [2021-11-06 11:27:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 524 states have (on average 1.1354961832061068) internal successors, (595), 535 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 595 transitions. [2021-11-06 11:27:43,836 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 595 transitions. Word has length 97 [2021-11-06 11:27:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 595 transitions. [2021-11-06 11:27:43,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 595 transitions. [2021-11-06 11:27:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:27:43,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:43,838 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:43,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:44,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:44,040 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1344967032, now seen corresponding path program 1 times [2021-11-06 11:27:44,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:44,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813540335] [2021-11-06 11:27:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:44,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 11:27:44,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:44,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813540335] [2021-11-06 11:27:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813540335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538539892] [2021-11-06 11:27:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:44,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:44,216 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) [2021-11-06 11:27:44,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 11:27:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-06 11:27:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-06 11:27:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-06 11:27:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 11:27:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538539892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:45,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:27:45,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 17 [2021-11-06 11:27:45,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26696309] [2021-11-06 11:27:45,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 11:27:45,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 11:27:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-06 11:27:45,332 INFO L87 Difference]: Start difference. First operand 536 states and 595 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:45,874 INFO L93 Difference]: Finished difference Result 1259 states and 1398 transitions. [2021-11-06 11:27:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 11:27:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:27:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:45,876 INFO L225 Difference]: With dead ends: 1259 [2021-11-06 11:27:45,876 INFO L226 Difference]: Without dead ends: 902 [2021-11-06 11:27:45,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-11-06 11:27:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-06 11:27:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 551. [2021-11-06 11:27:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 539 states have (on average 1.1354359925788498) internal successors, (612), 550 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 612 transitions. [2021-11-06 11:27:45,939 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 612 transitions. Word has length 97 [2021-11-06 11:27:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:45,939 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 612 transitions. [2021-11-06 11:27:45,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 612 transitions. [2021-11-06 11:27:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:27:45,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:45,940 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:45,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:46,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-06 11:27:46,141 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-06 11:27:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790966, now seen corresponding path program 1 times [2021-11-06 11:27:46,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:46,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94148403] [2021-11-06 11:27:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:46,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 11:27:46,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94148403] [2021-11-06 11:27:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94148403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:27:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450846978] [2021-11-06 11:27:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:46,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:46,783 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) [2021-11-06 11:27:46,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 11:27:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-06 11:27:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:47,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-06 11:27:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-06 11:27:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-06 11:27:47,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-06 11:27:47,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-06 11:27:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:48,095 INFO L354 Elim1Store]: treesize reduction 184, result has 30.3 percent of original size [2021-11-06 11:27:48,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 174 [2021-11-06 11:27:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:48,187 INFO L354 Elim1Store]: treesize reduction 224, result has 28.2 percent of original size [2021-11-06 11:27:48,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 189 treesize of output 222 [2021-11-06 11:27:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 11:27:59,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,574 INFO L354 Elim1Store]: treesize reduction 386, result has 39.1 percent of original size [2021-11-06 11:27:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 new quantified variables, introduced 21 case distinctions, treesize of input 374 treesize of output 508 [2021-11-06 11:27:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 11:27:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:27:59,783 INFO L354 Elim1Store]: treesize reduction 317, result has 31.7 percent of original size [2021-11-06 11:27:59,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 new quantified variables, introduced 21 case distinctions, treesize of input 580 treesize of output 488 Killed by 15