./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_priority_queue_clean_up_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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 11:12:13,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 11:12:13,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 11:12:13,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 11:12:13,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 11:12:13,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 11:12:13,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 11:12:13,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 11:12:13,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 11:12:13,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 11:12:13,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 11:12:13,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 11:12:13,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 11:12:13,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 11:12:13,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 11:12:13,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 11:12:13,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 11:12:13,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 11:12:13,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 11:12:13,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 11:12:13,404 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 11:12:13,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 11:12:13,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 11:12:13,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 11:12:13,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 11:12:13,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 11:12:13,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 11:12:13,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 11:12:13,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 11:12:13,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 11:12:13,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 11:12:13,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 11:12:13,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 11:12:13,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 11:12:13,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 11:12:13,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 11:12:13,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 11:12:13,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 11:12:13,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 11:12:13,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 11:12:13,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 11:12:13,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 11:12:13,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 11:12:13,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 11:12:13,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 11:12:13,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 11:12:13,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 11:12:13,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 11:12:13,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 11:12:13,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 11:12:13,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 11:12:13,450 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 11:12:13,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 11:12:13,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 11:12:13,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 11:12:13,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 11:12:13,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 11:12:13,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 11:12:13,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 11:12:13,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 11:12:13,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 11:12:13,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 11:12:13,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 11:12:13,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 11:12:13,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 11:12:13,454 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 11:12:13,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 11:12:13,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 11:12:13,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2022-07-12 11:12:13,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 11:12:13,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 11:12:13,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 11:12:13,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 11:12:13,634 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 11:12:13,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2022-07-12 11:12:13,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c8b5353/dc69977cd8894a45987d859f6843a6b2/FLAG37ccda3fc [2022-07-12 11:12:14,291 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 11:12:14,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2022-07-12 11:12:14,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c8b5353/dc69977cd8894a45987d859f6843a6b2/FLAG37ccda3fc [2022-07-12 11:12:14,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c8b5353/dc69977cd8894a45987d859f6843a6b2 [2022-07-12 11:12:14,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 11:12:14,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 11:12:14,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 11:12:14,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 11:12:14,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 11:12:14,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 11:12:14" (1/1) ... [2022-07-12 11:12:14,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11884d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:14, skipping insertion in model container [2022-07-12 11:12:14,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 11:12:14" (1/1) ... [2022-07-12 11:12:14,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 11:12:14,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 11:12:14,907 WARN L230 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_priority_queue_clean_up_harness.i[4501,4514] [2022-07-12 11:12:14,913 WARN L230 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_priority_queue_clean_up_harness.i[4561,4574] [2022-07-12 11:12:15,332 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 11:12:15,368 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,369 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,370 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,370 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,371 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,380 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,383 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,384 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,385 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 11:12:15,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 11:12:15,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 11:12:15,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 11:12:15,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 11:12:15,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 11:12:15,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 11:12:15,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 11:12:15,555 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 11:12:15,555 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 11:12:15,629 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,630 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 11:12:15,693 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 11:12:15,708 WARN L230 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_priority_queue_clean_up_harness.i[4501,4514] [2022-07-12 11:12:15,709 WARN L230 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_priority_queue_clean_up_harness.i[4561,4574] [2022-07-12 11:12:15,738 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 11:12:15,749 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,759 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,768 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,770 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,770 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,771 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,798 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 11:12:15,799 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 11:12:15,799 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 11:12:15,800 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 11:12:15,802 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 11:12:15,803 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 11:12:15,803 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 11:12:15,803 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 11:12:15,804 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 11:12:15,804 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 11:12:15,833 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,834 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:12:15,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 11:12:15,992 INFO L208 MainTranslator]: Completed translation [2022-07-12 11:12:15,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15 WrapperNode [2022-07-12 11:12:15,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 11:12:15,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 11:12:15,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 11:12:15,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 11:12:15,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,110 INFO L137 Inliner]: procedures = 689, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 598 [2022-07-12 11:12:16,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 11:12:16,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 11:12:16,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 11:12:16,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 11:12:16,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 11:12:16,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 11:12:16,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 11:12:16,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 11:12:16,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (1/1) ... [2022-07-12 11:12:16,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 11:12:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:16,220 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) [2022-07-12 11:12:16,260 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 [2022-07-12 11:12:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-12 11:12:16,270 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-12 11:12:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 11:12:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-07-12 11:12:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-07-12 11:12:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-12 11:12:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-12 11:12:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-12 11:12:16,272 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-12 11:12:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 11:12:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-12 11:12:16,273 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-12 11:12:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 11:12:16,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 11:12:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2022-07-12 11:12:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2022-07-12 11:12:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-12 11:12:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-12 11:12:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-12 11:12:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-12 11:12:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-07-12 11:12:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-07-12 11:12:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-12 11:12:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-12 11:12:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 11:12:16,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 11:12:16,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 11:12:16,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 11:12:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 11:12:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-12 11:12:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-12 11:12:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-12 11:12:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-12 11:12:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 11:12:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-07-12 11:12:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-07-12 11:12:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-07-12 11:12:16,278 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-07-12 11:12:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-07-12 11:12:16,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-07-12 11:12:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 11:12:16,472 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 11:12:16,473 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 11:12:17,042 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 11:12:17,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 11:12:17,048 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 11:12:17,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 11:12:17 BoogieIcfgContainer [2022-07-12 11:12:17,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 11:12:17,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 11:12:17,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 11:12:17,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 11:12:17,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 11:12:14" (1/3) ... [2022-07-12 11:12:17,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a61734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 11:12:17, skipping insertion in model container [2022-07-12 11:12:17,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:12:15" (2/3) ... [2022-07-12 11:12:17,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a61734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 11:12:17, skipping insertion in model container [2022-07-12 11:12:17,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 11:12:17" (3/3) ... [2022-07-12 11:12:17,058 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2022-07-12 11:12:17,067 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 11:12:17,067 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 11:12:17,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 11:12:17,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b9a3033, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4265314 [2022-07-12 11:12:17,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 11:12:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 11:12:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-12 11:12:17,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:17,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 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] [2022-07-12 11:12:17,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2022-07-12 11:12:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:17,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606073568] [2022-07-12 11:12:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:12:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:12:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:12:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-12 11:12:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 11:12:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 11:12:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 11:12:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 11:12:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 11:12:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-12 11:12:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-12 11:12:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:17,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606073568] [2022-07-12 11:12:17,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606073568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:17,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:17,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:17,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011501232] [2022-07-12 11:12:17,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:17,818 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-12 11:12:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:18,243 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2022-07-12 11:12:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 11:12:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2022-07-12 11:12:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:18,256 INFO L225 Difference]: With dead ends: 361 [2022-07-12 11:12:18,259 INFO L226 Difference]: Without dead ends: 202 [2022-07-12 11:12:18,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:18,265 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:18,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 305 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 11:12:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-12 11:12:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2022-07-12 11:12:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 11:12:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2022-07-12 11:12:18,313 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2022-07-12 11:12:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:18,314 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2022-07-12 11:12:18,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-12 11:12:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2022-07-12 11:12:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 11:12:18,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:18,316 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1] [2022-07-12 11:12:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 11:12:18,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2022-07-12 11:12:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:18,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57418480] [2022-07-12 11:12:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:12:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:12:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:12:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-12 11:12:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 11:12:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 11:12:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 11:12:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 11:12:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 11:12:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 11:12:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-12 11:12:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-12 11:12:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57418480] [2022-07-12 11:12:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57418480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:18,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:18,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 11:12:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060136287] [2022-07-12 11:12:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:18,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 11:12:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 11:12:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 11:12:18,659 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-12 11:12:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:19,227 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2022-07-12 11:12:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 11:12:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2022-07-12 11:12:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:19,231 INFO L225 Difference]: With dead ends: 341 [2022-07-12 11:12:19,231 INFO L226 Difference]: Without dead ends: 245 [2022-07-12 11:12:19,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-12 11:12:19,232 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 278 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:19,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 593 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 11:12:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-12 11:12:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2022-07-12 11:12:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 11:12:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2022-07-12 11:12:19,269 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2022-07-12 11:12:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:19,270 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2022-07-12 11:12:19,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-12 11:12:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2022-07-12 11:12:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 11:12:19,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:19,271 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:19,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 11:12:19,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2022-07-12 11:12:19,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:19,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084468341] [2022-07-12 11:12:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:19,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:12:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:12:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:12:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-12 11:12:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 11:12:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 11:12:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 11:12:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:12:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 11:12:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-12 11:12:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 11:12:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 11:12:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:12:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-12 11:12:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-12 11:12:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-12 11:12:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084468341] [2022-07-12 11:12:19,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084468341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:19,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:19,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 11:12:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525874138] [2022-07-12 11:12:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 11:12:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 11:12:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 11:12:19,568 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-12 11:12:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:20,234 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2022-07-12 11:12:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 11:12:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2022-07-12 11:12:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:20,236 INFO L225 Difference]: With dead ends: 371 [2022-07-12 11:12:20,236 INFO L226 Difference]: Without dead ends: 226 [2022-07-12 11:12:20,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-12 11:12:20,238 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 255 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:20,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 834 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 11:12:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-12 11:12:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2022-07-12 11:12:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-12 11:12:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-07-12 11:12:20,258 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2022-07-12 11:12:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:20,258 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-07-12 11:12:20,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-12 11:12:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-07-12 11:12:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-12 11:12:20,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:20,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 11:12:20,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2022-07-12 11:12:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:20,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240404219] [2022-07-12 11:12:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:20,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247299086] [2022-07-12 11:12:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:20,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:20,332 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) [2022-07-12 11:12:20,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 11:12:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 11:12:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-12 11:12:20,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240404219] [2022-07-12 11:12:20,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247299086] [2022-07-12 11:12:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247299086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:20,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:20,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 11:12:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390124448] [2022-07-12 11:12:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:20,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 11:12:20,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 11:12:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 11:12:20,830 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-12 11:12:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:20,978 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2022-07-12 11:12:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 11:12:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2022-07-12 11:12:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:20,980 INFO L225 Difference]: With dead ends: 261 [2022-07-12 11:12:20,980 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 11:12:20,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-12 11:12:20,981 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:20,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 781 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:12:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 11:12:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-07-12 11:12:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-12 11:12:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-07-12 11:12:20,990 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2022-07-12 11:12:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:20,990 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-07-12 11:12:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-12 11:12:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-07-12 11:12:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-12 11:12:20,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:20,991 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:21,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:21,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2022-07-12 11:12:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:21,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937305028] [2022-07-12 11:12:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:21,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:21,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:21,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082865543] [2022-07-12 11:12:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:21,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:21,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:21,279 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) [2022-07-12 11:12:21,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 11:12:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:21,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 11:12:21,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-12 11:12:21,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937305028] [2022-07-12 11:12:21,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082865543] [2022-07-12 11:12:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082865543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:21,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:21,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 11:12:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120411453] [2022-07-12 11:12:21,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:21,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 11:12:21,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 11:12:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 11:12:21,709 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-07-12 11:12:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:21,874 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2022-07-12 11:12:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 11:12:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2022-07-12 11:12:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:21,875 INFO L225 Difference]: With dead ends: 274 [2022-07-12 11:12:21,875 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 11:12:21,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-12 11:12:21,876 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:21,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1041 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:12:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 11:12:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-07-12 11:12:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-12 11:12:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2022-07-12 11:12:21,884 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2022-07-12 11:12:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:21,885 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2022-07-12 11:12:21,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-07-12 11:12:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2022-07-12 11:12:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 11:12:21,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:21,886 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:21,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:22,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:22,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2022-07-12 11:12:22,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214949625] [2022-07-12 11:12:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:22,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:22,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081445228] [2022-07-12 11:12:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:22,144 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) [2022-07-12 11:12:22,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 11:12:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 11:12:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-12 11:12:22,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:22,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214949625] [2022-07-12 11:12:22,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081445228] [2022-07-12 11:12:22,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081445228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:22,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:22,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 11:12:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103988090] [2022-07-12 11:12:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 11:12:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 11:12:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:12:22,629 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:22,778 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2022-07-12 11:12:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 11:12:22,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-07-12 11:12:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:22,780 INFO L225 Difference]: With dead ends: 286 [2022-07-12 11:12:22,780 INFO L226 Difference]: Without dead ends: 180 [2022-07-12 11:12:22,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 11:12:22,781 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:22,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 893 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:12:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-12 11:12:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2022-07-12 11:12:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-12 11:12:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2022-07-12 11:12:22,788 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2022-07-12 11:12:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:22,789 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2022-07-12 11:12:22,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2022-07-12 11:12:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 11:12:22,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:22,790 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:22,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:23,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2022-07-12 11:12:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826460079] [2022-07-12 11:12:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:23,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842355550] [2022-07-12 11:12:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:23,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:23,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:23,055 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) [2022-07-12 11:12:23,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 11:12:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 11:12:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-12 11:12:23,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:23,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826460079] [2022-07-12 11:12:23,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842355550] [2022-07-12 11:12:23,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842355550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:23,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:23,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:23,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707351865] [2022-07-12 11:12:23,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:23,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:23,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:23,478 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:23,496 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2022-07-12 11:12:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 11:12:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-07-12 11:12:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:23,498 INFO L225 Difference]: With dead ends: 274 [2022-07-12 11:12:23,498 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 11:12:23,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:23,499 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:23,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 11:12:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-07-12 11:12:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-12 11:12:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-07-12 11:12:23,506 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2022-07-12 11:12:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:23,507 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-07-12 11:12:23,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-07-12 11:12:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 11:12:23,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:23,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:23,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:23,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2022-07-12 11:12:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096316570] [2022-07-12 11:12:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:23,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241110522] [2022-07-12 11:12:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:23,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:23,784 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) [2022-07-12 11:12:23,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 11:12:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:24,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 11:12:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-12 11:12:24,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-12 11:12:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096316570] [2022-07-12 11:12:24,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241110522] [2022-07-12 11:12:24,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241110522] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 11:12:24,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:12:24,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-07-12 11:12:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790630846] [2022-07-12 11:12:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 11:12:24,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 11:12:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-12 11:12:24,346 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-07-12 11:12:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:24,380 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2022-07-12 11:12:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 11:12:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2022-07-12 11:12:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:24,381 INFO L225 Difference]: With dead ends: 178 [2022-07-12 11:12:24,381 INFO L226 Difference]: Without dead ends: 176 [2022-07-12 11:12:24,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-12 11:12:24,382 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:24,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 970 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-12 11:12:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-07-12 11:12:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-07-12 11:12:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2022-07-12 11:12:24,390 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2022-07-12 11:12:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:24,390 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2022-07-12 11:12:24,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-07-12 11:12:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2022-07-12 11:12:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 11:12:24,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:24,392 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:24,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:24,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2022-07-12 11:12:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444526593] [2022-07-12 11:12:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:24,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480802509] [2022-07-12 11:12:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:24,680 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) [2022-07-12 11:12:24,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 11:12:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 11:12:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-12 11:12:25,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444526593] [2022-07-12 11:12:25,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480802509] [2022-07-12 11:12:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480802509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:25,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:25,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 11:12:25,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720992527] [2022-07-12 11:12:25,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:25,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 11:12:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 11:12:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:12:25,088 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:12:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:25,129 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2022-07-12 11:12:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 11:12:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2022-07-12 11:12:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:25,135 INFO L225 Difference]: With dead ends: 281 [2022-07-12 11:12:25,136 INFO L226 Difference]: Without dead ends: 175 [2022-07-12 11:12:25,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 11:12:25,137 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:25,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 944 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-12 11:12:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-07-12 11:12:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-07-12 11:12:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2022-07-12 11:12:25,144 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2022-07-12 11:12:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:25,145 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2022-07-12 11:12:25,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:12:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2022-07-12 11:12:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-12 11:12:25,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:25,146 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:25,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:25,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2022-07-12 11:12:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:25,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565533791] [2022-07-12 11:12:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:25,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:25,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424965519] [2022-07-12 11:12:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:25,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:25,414 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) [2022-07-12 11:12:25,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 11:12:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 11:12:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-12 11:12:25,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565533791] [2022-07-12 11:12:25,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:25,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424965519] [2022-07-12 11:12:25,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424965519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:25,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:25,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 11:12:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337694906] [2022-07-12 11:12:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:25,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 11:12:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 11:12:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 11:12:25,825 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:12:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:25,889 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2022-07-12 11:12:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 11:12:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2022-07-12 11:12:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:25,891 INFO L225 Difference]: With dead ends: 283 [2022-07-12 11:12:25,891 INFO L226 Difference]: Without dead ends: 177 [2022-07-12 11:12:25,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 11:12:25,892 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:25,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 942 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-12 11:12:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-07-12 11:12:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-07-12 11:12:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2022-07-12 11:12:25,899 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2022-07-12 11:12:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:25,899 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2022-07-12 11:12:25,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:12:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2022-07-12 11:12:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 11:12:25,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:25,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:25,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:26,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2022-07-12 11:12:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:26,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957576788] [2022-07-12 11:12:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:26,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:26,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:26,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725835737] [2022-07-12 11:12:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:26,192 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) [2022-07-12 11:12:26,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 11:12:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 11:12:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-12 11:12:26,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:26,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957576788] [2022-07-12 11:12:26,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725835737] [2022-07-12 11:12:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725835737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:26,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:26,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066345173] [2022-07-12 11:12:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:26,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:26,571 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:26,610 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2022-07-12 11:12:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 11:12:26,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2022-07-12 11:12:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:26,614 INFO L225 Difference]: With dead ends: 293 [2022-07-12 11:12:26,614 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 11:12:26,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:26,615 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 11:12:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2022-07-12 11:12:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-07-12 11:12:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2022-07-12 11:12:26,624 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2022-07-12 11:12:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:26,624 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2022-07-12 11:12:26,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2022-07-12 11:12:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 11:12:26,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:26,626 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:26,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 11:12:26,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2022-07-12 11:12:26,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900467451] [2022-07-12 11:12:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:26,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:26,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180058057] [2022-07-12 11:12:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:26,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:26,890 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) [2022-07-12 11:12:26,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 11:12:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 11:12:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:27,446 INFO L390 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 11 treesize of output 5 [2022-07-12 11:12:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-12 11:12:27,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900467451] [2022-07-12 11:12:27,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180058057] [2022-07-12 11:12:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180058057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:27,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:27,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 11:12:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356211935] [2022-07-12 11:12:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 11:12:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 11:12:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-12 11:12:27,459 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 11:12:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:27,715 INFO L93 Difference]: Finished difference Result 319 states and 401 transitions. [2022-07-12 11:12:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 11:12:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 179 [2022-07-12 11:12:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:27,717 INFO L225 Difference]: With dead ends: 319 [2022-07-12 11:12:27,717 INFO L226 Difference]: Without dead ends: 202 [2022-07-12 11:12:27,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-12 11:12:27,718 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 107 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:27,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1454 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:12:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-12 11:12:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2022-07-12 11:12:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 138 states have internal predecessors, (161), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 241 transitions. [2022-07-12 11:12:27,725 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 241 transitions. Word has length 179 [2022-07-12 11:12:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:27,725 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 241 transitions. [2022-07-12 11:12:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 11:12:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 241 transitions. [2022-07-12 11:12:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 11:12:27,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:27,727 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:27,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:27,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:27,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1965868264, now seen corresponding path program 1 times [2022-07-12 11:12:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776704807] [2022-07-12 11:12:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:27,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:27,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564387198] [2022-07-12 11:12:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:27,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:27,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:27,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 11:12:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 11:12:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-12 11:12:28,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:28,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776704807] [2022-07-12 11:12:28,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564387198] [2022-07-12 11:12:28,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564387198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:28,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:28,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 11:12:28,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068245834] [2022-07-12 11:12:28,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:28,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 11:12:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 11:12:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:28,490 INFO L87 Difference]: Start difference. First operand 192 states and 241 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:28,517 INFO L93 Difference]: Finished difference Result 307 states and 387 transitions. [2022-07-12 11:12:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 11:12:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2022-07-12 11:12:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:28,519 INFO L225 Difference]: With dead ends: 307 [2022-07-12 11:12:28,519 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 11:12:28,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:12:28,520 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 4 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:28,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 782 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 11:12:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2022-07-12 11:12:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 139 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 37 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 243 transitions. [2022-07-12 11:12:28,528 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 243 transitions. Word has length 179 [2022-07-12 11:12:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 243 transitions. [2022-07-12 11:12:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 243 transitions. [2022-07-12 11:12:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-12 11:12:28,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:28,530 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:28,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 11:12:28,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254556, now seen corresponding path program 1 times [2022-07-12 11:12:28,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869106268] [2022-07-12 11:12:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:28,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700669702] [2022-07-12 11:12:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:28,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:28,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:28,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 11:12:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:29,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 11:12:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 11:12:29,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869106268] [2022-07-12 11:12:29,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700669702] [2022-07-12 11:12:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700669702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:29,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430174301] [2022-07-12 11:12:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:29,282 INFO L87 Difference]: Start difference. First operand 194 states and 243 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:29,297 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2022-07-12 11:12:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 11:12:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2022-07-12 11:12:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:29,299 INFO L225 Difference]: With dead ends: 222 [2022-07-12 11:12:29,299 INFO L226 Difference]: Without dead ends: 195 [2022-07-12 11:12:29,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:29,300 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:29,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 582 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-12 11:12:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-07-12 11:12:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 137 states have (on average 1.197080291970803) internal successors, (164), 139 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 244 transitions. [2022-07-12 11:12:29,309 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 244 transitions. Word has length 182 [2022-07-12 11:12:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:29,309 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 244 transitions. [2022-07-12 11:12:29,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 244 transitions. [2022-07-12 11:12:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-12 11:12:29,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:29,312 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:29,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:29,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 11:12:29,516 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 2 times [2022-07-12 11:12:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:29,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993471078] [2022-07-12 11:12:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:29,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:29,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177628803] [2022-07-12 11:12:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:12:29,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:29,584 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:29,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 11:12:30,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:12:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:12:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 11:12:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-12 11:12:30,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:30,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:30,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993471078] [2022-07-12 11:12:30,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:30,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177628803] [2022-07-12 11:12:30,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177628803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:30,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:30,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 11:12:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956605656] [2022-07-12 11:12:30,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:30,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 11:12:30,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 11:12:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:30,135 INFO L87 Difference]: Start difference. First operand 195 states and 244 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:30,159 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2022-07-12 11:12:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 11:12:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2022-07-12 11:12:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:30,161 INFO L225 Difference]: With dead ends: 330 [2022-07-12 11:12:30,161 INFO L226 Difference]: Without dead ends: 211 [2022-07-12 11:12:30,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:12:30,162 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 9 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:30,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 788 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-12 11:12:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-07-12 11:12:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 149 states have internal predecessors, (176), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2022-07-12 11:12:30,169 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 185 [2022-07-12 11:12:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2022-07-12 11:12:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2022-07-12 11:12:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-12 11:12:30,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:30,170 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:30,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 11:12:30,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 747347188, now seen corresponding path program 1 times [2022-07-12 11:12:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724636001] [2022-07-12 11:12:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:30,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:30,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865403355] [2022-07-12 11:12:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:30,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:30,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 11:12:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 11:12:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-12 11:12:30,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724636001] [2022-07-12 11:12:30,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865403355] [2022-07-12 11:12:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865403355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500296507] [2022-07-12 11:12:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:30,851 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:30,870 INFO L93 Difference]: Finished difference Result 332 states and 412 transitions. [2022-07-12 11:12:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 11:12:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2022-07-12 11:12:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:30,871 INFO L225 Difference]: With dead ends: 332 [2022-07-12 11:12:30,871 INFO L226 Difference]: Without dead ends: 201 [2022-07-12 11:12:30,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:30,872 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:30,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 582 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-12 11:12:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2022-07-12 11:12:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 141 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2022-07-12 11:12:30,879 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 185 [2022-07-12 11:12:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:30,879 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2022-07-12 11:12:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2022-07-12 11:12:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-12 11:12:30,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:30,881 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:30,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:31,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 11:12:31,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2022-07-12 11:12:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838776514] [2022-07-12 11:12:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:31,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:31,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206898332] [2022-07-12 11:12:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:31,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:31,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:31,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 11:12:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:31,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 11:12:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 11:12:31,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:31,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:31,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838776514] [2022-07-12 11:12:31,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206898332] [2022-07-12 11:12:31,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206898332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:31,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:31,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:12:31,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285245716] [2022-07-12 11:12:31,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:31,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:12:31,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:12:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:12:31,598 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:31,617 INFO L93 Difference]: Finished difference Result 347 states and 435 transitions. [2022-07-12 11:12:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 11:12:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2022-07-12 11:12:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:31,619 INFO L225 Difference]: With dead ends: 347 [2022-07-12 11:12:31,619 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 11:12:31,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:12:31,620 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:31,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:12:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 11:12:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-07-12 11:12:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 141 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2022-07-12 11:12:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2022-07-12 11:12:31,640 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 185 [2022-07-12 11:12:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:31,641 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2022-07-12 11:12:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-12 11:12:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2022-07-12 11:12:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-12 11:12:31,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:31,642 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:31,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:31,847 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2022-07-12 11:12:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675542394] [2022-07-12 11:12:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:31,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:31,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100552566] [2022-07-12 11:12:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:31,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:31,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:31,901 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:31,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 11:12:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-12 11:12:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:32,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:12:32,689 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 11:12:32,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:12:34,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:37,329 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1772 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1772) |c_#memory_int|)) is different from true [2022-07-12 11:12:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 20 refuted. 2 times theorem prover too weak. 42 trivial. 3 not checked. [2022-07-12 11:12:37,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675542394] [2022-07-12 11:12:38,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100552566] [2022-07-12 11:12:38,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100552566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:12:38,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:12:38,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-12 11:12:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467460499] [2022-07-12 11:12:38,370 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 11:12:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 11:12:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 11:12:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=854, Unknown=40, NotChecked=60, Total=1056 [2022-07-12 11:12:38,371 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-12 11:12:38,813 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1772 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1772) |c_#memory_int|)) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_84| Int) (v_ArrVal_1769 Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_84| v_ArrVal_1769)) (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_84|) 0))) (exists ((v_ArrVal_1770 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1770)))) is different from true [2022-07-12 11:12:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:39,378 INFO L93 Difference]: Finished difference Result 395 states and 495 transitions. [2022-07-12 11:12:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 11:12:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2022-07-12 11:12:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:39,380 INFO L225 Difference]: With dead ends: 395 [2022-07-12 11:12:39,381 INFO L226 Difference]: Without dead ends: 278 [2022-07-12 11:12:39,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=151, Invalid=1364, Unknown=53, NotChecked=154, Total=1722 [2022-07-12 11:12:39,382 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 94 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 3168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:39,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1766 Invalid, 3168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 989 Invalid, 0 Unknown, 2115 Unchecked, 0.6s Time] [2022-07-12 11:12:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-12 11:12:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2022-07-12 11:12:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 186 states have internal predecessors, (211), 40 states have call successors, (40), 22 states have call predecessors, (40), 29 states have return successors, (61), 43 states have call predecessors, (61), 39 states have call successors, (61) [2022-07-12 11:12:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 312 transitions. [2022-07-12 11:12:39,394 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 312 transitions. Word has length 187 [2022-07-12 11:12:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:39,394 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 312 transitions. [2022-07-12 11:12:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-12 11:12:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 312 transitions. [2022-07-12 11:12:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-12 11:12:39,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:39,396 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:39,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:39,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 11:12:39,611 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1925449391, now seen corresponding path program 1 times [2022-07-12 11:12:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310763483] [2022-07-12 11:12:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:39,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:39,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:39,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098423375] [2022-07-12 11:12:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:39,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:39,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 11:12:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 11:12:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:40,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:12:40,381 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 11:12:40,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:42,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:12:42,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:44,576 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1924 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1924) |c_#memory_int|)) is different from true [2022-07-12 11:12:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2022-07-12 11:12:44,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310763483] [2022-07-12 11:12:45,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098423375] [2022-07-12 11:12:45,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098423375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:12:45,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:12:45,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 11:12:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127618580] [2022-07-12 11:12:45,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 11:12:45,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 11:12:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:45,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 11:12:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=430, Unknown=7, NotChecked=42, Total=552 [2022-07-12 11:12:45,282 INFO L87 Difference]: Start difference. First operand 251 states and 312 transitions. Second operand has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-07-12 11:12:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:46,286 INFO L93 Difference]: Finished difference Result 481 states and 607 transitions. [2022-07-12 11:12:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 11:12:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 193 [2022-07-12 11:12:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:46,288 INFO L225 Difference]: With dead ends: 481 [2022-07-12 11:12:46,289 INFO L226 Difference]: Without dead ends: 347 [2022-07-12 11:12:46,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=121, Invalid=795, Unknown=18, NotChecked=58, Total=992 [2022-07-12 11:12:46,290 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 138 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:46,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1237 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1055 Invalid, 0 Unknown, 867 Unchecked, 0.7s Time] [2022-07-12 11:12:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-07-12 11:12:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 275. [2022-07-12 11:12:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 201 states have (on average 1.1741293532338308) internal successors, (236), 207 states have internal predecessors, (236), 41 states have call successors, (41), 23 states have call predecessors, (41), 32 states have return successors, (65), 45 states have call predecessors, (65), 40 states have call successors, (65) [2022-07-12 11:12:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2022-07-12 11:12:46,300 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 193 [2022-07-12 11:12:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:46,301 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2022-07-12 11:12:46,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-07-12 11:12:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2022-07-12 11:12:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-12 11:12:46,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:46,302 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:46,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:46,516 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2022-07-12 11:12:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99262805] [2022-07-12 11:12:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:46,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248987021] [2022-07-12 11:12:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:46,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 11:12:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-12 11:12:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:47,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:12:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:12:47,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-12 11:12:47,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-12 11:12:47,502 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 11:12:47,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:47,559 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 11:12:47,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 11:12:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:12:49,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 11:12:52,207 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2086 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2086) |c_#memory_int|)) is different from true [2022-07-12 11:12:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 43 proven. 22 refuted. 2 times theorem prover too weak. 42 trivial. 3 not checked. [2022-07-12 11:12:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:53,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:53,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99262805] [2022-07-12 11:12:53,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:53,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248987021] [2022-07-12 11:12:53,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248987021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:12:53,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:12:53,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-12 11:12:53,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496176475] [2022-07-12 11:12:53,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 11:12:53,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 11:12:53,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 11:12:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1030, Unknown=47, NotChecked=66, Total=1260 [2022-07-12 11:12:53,456 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 11:12:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:54,524 INFO L93 Difference]: Finished difference Result 471 states and 588 transitions. [2022-07-12 11:12:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 11:12:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 193 [2022-07-12 11:12:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:54,526 INFO L225 Difference]: With dead ends: 471 [2022-07-12 11:12:54,526 INFO L226 Difference]: Without dead ends: 339 [2022-07-12 11:12:54,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 226 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=165, Invalid=1586, Unknown=59, NotChecked=82, Total=1892 [2022-07-12 11:12:54,529 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 101 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2151 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:54,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1844 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 924 Invalid, 0 Unknown, 2151 Unchecked, 0.6s Time] [2022-07-12 11:12:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-12 11:12:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 312. [2022-07-12 11:12:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 236 states have internal predecessors, (269), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2022-07-12 11:12:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 388 transitions. [2022-07-12 11:12:54,547 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 388 transitions. Word has length 193 [2022-07-12 11:12:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:54,547 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 388 transitions. [2022-07-12 11:12:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 11:12:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 388 transitions. [2022-07-12 11:12:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-12 11:12:54,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:54,549 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:54,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:54,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:54,784 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash -16710381, now seen corresponding path program 1 times [2022-07-12 11:12:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:54,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825524374] [2022-07-12 11:12:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:54,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:54,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284564463] [2022-07-12 11:12:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:54,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:54,832 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:54,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 11:12:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:56,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 11:12:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-12 11:12:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-12 11:12:56,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825524374] [2022-07-12 11:12:56,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284564463] [2022-07-12 11:12:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284564463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:12:56,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:12:56,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 11:12:56,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280501173] [2022-07-12 11:12:56,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:12:56,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 11:12:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 11:12:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-07-12 11:12:56,812 INFO L87 Difference]: Start difference. First operand 312 states and 388 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-12 11:12:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:56,940 INFO L93 Difference]: Finished difference Result 470 states and 604 transitions. [2022-07-12 11:12:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 11:12:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 193 [2022-07-12 11:12:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:56,942 INFO L225 Difference]: With dead ends: 470 [2022-07-12 11:12:56,942 INFO L226 Difference]: Without dead ends: 327 [2022-07-12 11:12:56,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-07-12 11:12:56,943 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 46 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:56,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 940 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:12:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-12 11:12:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 321. [2022-07-12 11:12:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 238 states have (on average 1.180672268907563) internal successors, (281), 245 states have internal predecessors, (281), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2022-07-12 11:12:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 400 transitions. [2022-07-12 11:12:56,956 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 400 transitions. Word has length 193 [2022-07-12 11:12:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:56,956 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 400 transitions. [2022-07-12 11:12:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-12 11:12:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 400 transitions. [2022-07-12 11:12:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-12 11:12:56,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:56,958 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:56,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:57,164 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1529453249, now seen corresponding path program 1 times [2022-07-12 11:12:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:57,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173284698] [2022-07-12 11:12:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:57,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:57,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:57,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151365432] [2022-07-12 11:12:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:57,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:57,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 11:12:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 11:12:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-12 11:12:57,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:12:57,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173284698] [2022-07-12 11:12:57,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151365432] [2022-07-12 11:12:57,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151365432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:12:57,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:12:57,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 11:12:57,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231963996] [2022-07-12 11:12:57,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:12:57,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 11:12:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 11:12:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 11:12:57,763 INFO L87 Difference]: Start difference. First operand 321 states and 400 transitions. Second operand has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2022-07-12 11:12:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:57,981 INFO L93 Difference]: Finished difference Result 471 states and 585 transitions. [2022-07-12 11:12:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 11:12:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) Word has length 205 [2022-07-12 11:12:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:57,984 INFO L225 Difference]: With dead ends: 471 [2022-07-12 11:12:57,984 INFO L226 Difference]: Without dead ends: 319 [2022-07-12 11:12:57,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-12 11:12:57,985 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:57,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1043 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:12:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-12 11:12:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-07-12 11:12:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.1772151898734178) internal successors, (279), 243 states have internal predecessors, (279), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2022-07-12 11:12:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2022-07-12 11:12:58,005 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 205 [2022-07-12 11:12:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:58,005 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2022-07-12 11:12:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2022-07-12 11:12:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2022-07-12 11:12:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-12 11:12:58,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:58,007 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:58,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:58,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2089690696, now seen corresponding path program 1 times [2022-07-12 11:12:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107740171] [2022-07-12 11:12:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:58,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:58,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523623497] [2022-07-12 11:12:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:58,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:58,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 11:12:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 11:12:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:12:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-12 11:12:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:12:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 11:12:59,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:12:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107740171] [2022-07-12 11:12:59,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:12:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523623497] [2022-07-12 11:12:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523623497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:12:59,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:12:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-12 11:12:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762255633] [2022-07-12 11:12:59,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:12:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 11:12:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:12:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 11:12:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-12 11:12:59,117 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2022-07-12 11:12:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:12:59,220 INFO L93 Difference]: Finished difference Result 464 states and 573 transitions. [2022-07-12 11:12:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 11:12:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 226 [2022-07-12 11:12:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:12:59,223 INFO L225 Difference]: With dead ends: 464 [2022-07-12 11:12:59,223 INFO L226 Difference]: Without dead ends: 322 [2022-07-12 11:12:59,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-12 11:12:59,224 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 17 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:12:59,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1868 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:12:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-07-12 11:12:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2022-07-12 11:12:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 239 states have (on average 1.1757322175732217) internal successors, (281), 245 states have internal predecessors, (281), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2022-07-12 11:12:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 399 transitions. [2022-07-12 11:12:59,235 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 399 transitions. Word has length 226 [2022-07-12 11:12:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:12:59,236 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 399 transitions. [2022-07-12 11:12:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2022-07-12 11:12:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 399 transitions. [2022-07-12 11:12:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-12 11:12:59,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:12:59,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:12:59,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 11:12:59,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 11:12:59,452 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:12:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:12:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1940716689, now seen corresponding path program 1 times [2022-07-12 11:12:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:12:59,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971927517] [2022-07-12 11:12:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:59,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:12:59,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:12:59,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364588012] [2022-07-12 11:12:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:12:59,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:12:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:12:59,498 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:12:59,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 11:12:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:12:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 11:12:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-12 11:13:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 11:13:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971927517] [2022-07-12 11:13:00,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364588012] [2022-07-12 11:13:00,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364588012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:00,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-12 11:13:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499808102] [2022-07-12 11:13:00,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 11:13:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 11:13:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-12 11:13:00,400 INFO L87 Difference]: Start difference. First operand 321 states and 399 transitions. Second operand has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-12 11:13:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:00,526 INFO L93 Difference]: Finished difference Result 468 states and 577 transitions. [2022-07-12 11:13:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 11:13:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) Word has length 222 [2022-07-12 11:13:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:00,528 INFO L225 Difference]: With dead ends: 468 [2022-07-12 11:13:00,528 INFO L226 Difference]: Without dead ends: 324 [2022-07-12 11:13:00,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-07-12 11:13:00,529 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 44 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:00,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1658 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-12 11:13:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-07-12 11:13:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 241 states have (on average 1.1742738589211619) internal successors, (283), 247 states have internal predecessors, (283), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2022-07-12 11:13:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2022-07-12 11:13:00,540 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 222 [2022-07-12 11:13:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:00,540 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2022-07-12 11:13:00,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-12 11:13:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2022-07-12 11:13:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-12 11:13:00,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:00,542 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:00,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-12 11:13:00,763 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash 783622132, now seen corresponding path program 2 times [2022-07-12 11:13:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634068588] [2022-07-12 11:13:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:00,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498873492] [2022-07-12 11:13:00,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:13:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:00,813 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:13:00,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 11:13:01,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:13:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 11:13:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-12 11:13:01,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 11:13:01,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634068588] [2022-07-12 11:13:01,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498873492] [2022-07-12 11:13:01,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498873492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:01,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:01,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 11:13:01,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372387990] [2022-07-12 11:13:01,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:01,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 11:13:01,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 11:13:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-12 11:13:01,928 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2022-07-12 11:13:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:02,069 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2022-07-12 11:13:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 11:13:02,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 230 [2022-07-12 11:13:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:02,071 INFO L225 Difference]: With dead ends: 472 [2022-07-12 11:13:02,071 INFO L226 Difference]: Without dead ends: 326 [2022-07-12 11:13:02,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-12 11:13:02,072 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 37 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:02,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1691 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-12 11:13:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2022-07-12 11:13:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 243 states have (on average 1.1728395061728396) internal successors, (285), 249 states have internal predecessors, (285), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2022-07-12 11:13:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 403 transitions. [2022-07-12 11:13:02,084 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 403 transitions. Word has length 230 [2022-07-12 11:13:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:02,084 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 403 transitions. [2022-07-12 11:13:02,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2022-07-12 11:13:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 403 transitions. [2022-07-12 11:13:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-12 11:13:02,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:02,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:02,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:02,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:02,315 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1398750254, now seen corresponding path program 3 times [2022-07-12 11:13:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527216849] [2022-07-12 11:13:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:02,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:02,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344291038] [2022-07-12 11:13:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:13:02,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:02,381 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:13:02,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 11:13:02,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 11:13:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 11:13:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-12 11:13:02,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:02,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:02,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527216849] [2022-07-12 11:13:02,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:02,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344291038] [2022-07-12 11:13:02,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344291038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:02,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:02,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 11:13:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425591829] [2022-07-12 11:13:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:02,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 11:13:02,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 11:13:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-12 11:13:02,993 INFO L87 Difference]: Start difference. First operand 325 states and 403 transitions. Second operand has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) [2022-07-12 11:13:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:03,204 INFO L93 Difference]: Finished difference Result 480 states and 600 transitions. [2022-07-12 11:13:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 11:13:03,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) Word has length 232 [2022-07-12 11:13:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:03,206 INFO L225 Difference]: With dead ends: 480 [2022-07-12 11:13:03,206 INFO L226 Difference]: Without dead ends: 334 [2022-07-12 11:13:03,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-07-12 11:13:03,207 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 15 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:03,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2697 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-07-12 11:13:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2022-07-12 11:13:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 247 states have (on average 1.174089068825911) internal successors, (290), 254 states have internal predecessors, (290), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2022-07-12 11:13:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 410 transitions. [2022-07-12 11:13:03,219 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 410 transitions. Word has length 232 [2022-07-12 11:13:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:03,219 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 410 transitions. [2022-07-12 11:13:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) [2022-07-12 11:13:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 410 transitions. [2022-07-12 11:13:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-12 11:13:03,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:03,222 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:03,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:03,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:03,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 720148011, now seen corresponding path program 2 times [2022-07-12 11:13:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:03,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104906957] [2022-07-12 11:13:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:03,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:03,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:03,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840037539] [2022-07-12 11:13:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:13:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:03,490 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:13:03,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 11:13:05,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:13:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 11:13:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-12 11:13:05,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 11:13:06,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104906957] [2022-07-12 11:13:06,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840037539] [2022-07-12 11:13:06,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840037539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:06,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:06,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-12 11:13:06,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066158093] [2022-07-12 11:13:06,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:06,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 11:13:06,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 11:13:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-12 11:13:06,207 INFO L87 Difference]: Start difference. First operand 330 states and 410 transitions. Second operand has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2022-07-12 11:13:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:06,389 INFO L93 Difference]: Finished difference Result 486 states and 596 transitions. [2022-07-12 11:13:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 11:13:06,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 226 [2022-07-12 11:13:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:06,392 INFO L225 Difference]: With dead ends: 486 [2022-07-12 11:13:06,392 INFO L226 Difference]: Without dead ends: 333 [2022-07-12 11:13:06,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-12 11:13:06,393 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 50 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:06,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1876 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-12 11:13:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2022-07-12 11:13:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 249 states have (on average 1.1726907630522088) internal successors, (292), 256 states have internal predecessors, (292), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2022-07-12 11:13:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 412 transitions. [2022-07-12 11:13:06,404 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 412 transitions. Word has length 226 [2022-07-12 11:13:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:06,405 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 412 transitions. [2022-07-12 11:13:06,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2022-07-12 11:13:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 412 transitions. [2022-07-12 11:13:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-12 11:13:06,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:06,407 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:06,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:06,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 11:13:06,623 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2027128905, now seen corresponding path program 3 times [2022-07-12 11:13:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:06,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152874363] [2022-07-12 11:13:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:06,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:06,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621100653] [2022-07-12 11:13:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:13:06,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:06,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:13:06,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 11:14:41,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 11:14:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:14:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 11:14:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-12 11:14:42,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:14:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 11:14:42,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:14:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152874363] [2022-07-12 11:14:42,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:14:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621100653] [2022-07-12 11:14:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621100653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:14:42,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:14:42,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2022-07-12 11:14:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388823023] [2022-07-12 11:14:42,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:14:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 11:14:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:14:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 11:14:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-12 11:14:42,584 INFO L87 Difference]: Start difference. First operand 332 states and 412 transitions. Second operand has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-12 11:14:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:14:43,561 INFO L93 Difference]: Finished difference Result 532 states and 701 transitions. [2022-07-12 11:14:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 11:14:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 228 [2022-07-12 11:14:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:14:43,564 INFO L225 Difference]: With dead ends: 532 [2022-07-12 11:14:43,564 INFO L226 Difference]: Without dead ends: 369 [2022-07-12 11:14:43,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 11:14:43,565 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 142 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 11:14:43,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1901 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 11:14:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-12 11:14:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 350. [2022-07-12 11:14:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 267 states have (on average 1.1835205992509363) internal successors, (316), 274 states have internal predecessors, (316), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2022-07-12 11:14:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 436 transitions. [2022-07-12 11:14:43,580 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 436 transitions. Word has length 228 [2022-07-12 11:14:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:14:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 436 transitions. [2022-07-12 11:14:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-12 11:14:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 436 transitions. [2022-07-12 11:14:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-12 11:14:43,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:14:43,583 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:14:43,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 11:14:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 11:14:43,799 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:14:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:14:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1281085344, now seen corresponding path program 1 times [2022-07-12 11:14:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:14:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531001209] [2022-07-12 11:14:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:14:43,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:14:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942938075] [2022-07-12 11:14:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:43,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:14:43,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:14:43,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 11:14:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:14:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 11:14:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 163 proven. 25 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-07-12 11:14:44,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:14:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-12 11:14:45,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:14:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531001209] [2022-07-12 11:14:45,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:14:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942938075] [2022-07-12 11:14:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942938075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:14:45,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:14:45,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-07-12 11:14:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429329924] [2022-07-12 11:14:45,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:14:45,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 11:14:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:14:45,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 11:14:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-12 11:14:45,085 INFO L87 Difference]: Start difference. First operand 350 states and 436 transitions. Second operand has 21 states, 19 states have (on average 8.68421052631579) internal successors, (165), 21 states have internal predecessors, (165), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-12 11:14:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:14:45,296 INFO L93 Difference]: Finished difference Result 526 states and 648 transitions. [2022-07-12 11:14:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 11:14:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 8.68421052631579) internal successors, (165), 21 states have internal predecessors, (165), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 295 [2022-07-12 11:14:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:14:45,299 INFO L225 Difference]: With dead ends: 526 [2022-07-12 11:14:45,299 INFO L226 Difference]: Without dead ends: 353 [2022-07-12 11:14:45,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 568 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-07-12 11:14:45,300 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 41 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:14:45,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1886 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:14:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-12 11:14:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 352. [2022-07-12 11:14:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 269 states have (on average 1.1821561338289963) internal successors, (318), 276 states have internal predecessors, (318), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2022-07-12 11:14:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 438 transitions. [2022-07-12 11:14:45,312 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 438 transitions. Word has length 295 [2022-07-12 11:14:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:14:45,313 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 438 transitions. [2022-07-12 11:14:45,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 8.68421052631579) internal successors, (165), 21 states have internal predecessors, (165), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-12 11:14:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 438 transitions. [2022-07-12 11:14:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-07-12 11:14:45,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:14:45,315 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:14:45,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 11:14:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 11:14:45,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:14:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:14:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -949690780, now seen corresponding path program 2 times [2022-07-12 11:14:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:14:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723534447] [2022-07-12 11:14:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:14:45,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:14:45,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480615291] [2022-07-12 11:14:45,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:14:45,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:45,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:14:45,580 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:14:45,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 11:14:46,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:14:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:14:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 3324 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 11:14:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-07-12 11:14:46,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:14:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-07-12 11:14:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:14:47,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723534447] [2022-07-12 11:14:47,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:14:47,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480615291] [2022-07-12 11:14:47,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480615291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:14:47,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:14:47,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-07-12 11:14:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167597619] [2022-07-12 11:14:47,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:14:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 11:14:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:14:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 11:14:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-07-12 11:14:47,224 INFO L87 Difference]: Start difference. First operand 352 states and 438 transitions. Second operand has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-12 11:14:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:14:47,481 INFO L93 Difference]: Finished difference Result 530 states and 652 transitions. [2022-07-12 11:14:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 11:14:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 299 [2022-07-12 11:14:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:14:47,486 INFO L225 Difference]: With dead ends: 530 [2022-07-12 11:14:47,486 INFO L226 Difference]: Without dead ends: 355 [2022-07-12 11:14:47,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-07-12 11:14:47,487 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 52 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:14:47,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 2254 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:14:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-12 11:14:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2022-07-12 11:14:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 271 states have (on average 1.1808118081180812) internal successors, (320), 278 states have internal predecessors, (320), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2022-07-12 11:14:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 440 transitions. [2022-07-12 11:14:47,500 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 440 transitions. Word has length 299 [2022-07-12 11:14:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:14:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 440 transitions. [2022-07-12 11:14:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-07-12 11:14:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 440 transitions. [2022-07-12 11:14:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-07-12 11:14:47,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:14:47,503 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:14:47,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 11:14:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:47,714 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:14:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:14:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1955674728, now seen corresponding path program 3 times [2022-07-12 11:14:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:14:47,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244490012] [2022-07-12 11:14:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:14:47,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:14:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614134931] [2022-07-12 11:14:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:14:47,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:47,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:14:47,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:14:47,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 11:14:49,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 11:14:49,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:14:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 2311 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-12 11:14:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 77 proven. 40 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-07-12 11:14:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:14:50,150 INFO L356 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-07-12 11:14:50,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 69 [2022-07-12 11:14:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-07-12 11:14:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:14:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244490012] [2022-07-12 11:14:50,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:14:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614134931] [2022-07-12 11:14:50,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614134931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:14:50,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:14:50,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2022-07-12 11:14:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540288369] [2022-07-12 11:14:50,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:14:50,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 11:14:50,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:14:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 11:14:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-12 11:14:50,413 INFO L87 Difference]: Start difference. First operand 354 states and 440 transitions. Second operand has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2022-07-12 11:14:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:14:51,878 INFO L93 Difference]: Finished difference Result 469 states and 604 transitions. [2022-07-12 11:14:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 11:14:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) Word has length 303 [2022-07-12 11:14:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:14:51,880 INFO L225 Difference]: With dead ends: 469 [2022-07-12 11:14:51,880 INFO L226 Difference]: Without dead ends: 415 [2022-07-12 11:14:51,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 587 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-12 11:14:51,881 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 236 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 11:14:51,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2025 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 11:14:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-12 11:14:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 373. [2022-07-12 11:14:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 283 states have (on average 1.1802120141342756) internal successors, (334), 291 states have internal predecessors, (334), 50 states have call successors, (50), 26 states have call predecessors, (50), 39 states have return successors, (89), 56 states have call predecessors, (89), 49 states have call successors, (89) [2022-07-12 11:14:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 473 transitions. [2022-07-12 11:14:51,897 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 473 transitions. Word has length 303 [2022-07-12 11:14:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:14:51,898 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 473 transitions. [2022-07-12 11:14:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2022-07-12 11:14:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 473 transitions. [2022-07-12 11:14:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-12 11:14:51,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:14:51,901 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:14:51,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 11:14:52,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:52,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:14:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:14:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1301159256, now seen corresponding path program 1 times [2022-07-12 11:14:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:14:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144311192] [2022-07-12 11:14:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:14:52,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:14:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073504119] [2022-07-12 11:14:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:14:52,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:14:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:14:52,171 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:14:52,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 11:14:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:14:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3470 conjuncts, 442 conjunts are in the unsatisfiable core [2022-07-12 11:14:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:54,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:14:55,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 11:14:55,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-07-12 11:14:55,199 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 11:14:55,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2022-07-12 11:14:55,209 INFO L390 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 11:14:55,258 INFO L356 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-07-12 11:14:55,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-07-12 11:14:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:55,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 11:14:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:55,316 INFO L390 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 52 treesize of output 42 [2022-07-12 11:14:55,546 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5006 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5006) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_5005 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5005) |c_#memory_$Pointer$.base|)) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_518| Int) (v_ArrVal_5004 Int)) (and (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_518|) 0) (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_518| v_ArrVal_5004))))) is different from true [2022-07-12 11:14:57,750 INFO L356 Elim1Store]: treesize reduction 400, result has 21.7 percent of original size [2022-07-12 11:14:57,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 439 treesize of output 513 [2022-07-12 11:14:57,781 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 11:14:57,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-07-12 11:14:57,844 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 11:14:57,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 27 [2022-07-12 11:14:59,984 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5017 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5017) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_5015 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5015) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5016 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5016))) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_518| Int) (v_ArrVal_5004 Int)) (and (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_518|) 0) (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_518| v_ArrVal_5004))))) is different from true [2022-07-12 11:15:00,468 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 11:15:00,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 37 [2022-07-12 11:15:00,473 INFO L390 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:15:00,477 INFO L390 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:15:00,480 INFO L390 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 11:15:00,584 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 11:15:00,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 37 [2022-07-12 11:15:47,280 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 11:16:07,389 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)