./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_hash_byte_cursor_ptr_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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:07:49,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:07:49,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:07:49,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:07:49,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:07:49,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:07:49,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:07:49,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:07:49,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:07:49,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:07:49,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:07:49,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:07:49,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:07:49,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:07:49,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:07:49,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:07:49,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:07:49,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:07:49,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:07:49,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:07:49,483 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:07:49,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:07:49,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:07:49,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:07:49,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:07:49,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:07:49,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:07:49,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:07:49,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:07:49,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:07:49,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:07:49,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:07:49,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:07:49,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:07:49,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:07:49,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:07:49,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:07:49,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:07:49,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:07:49,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:07:49,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:07:49,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:07:49,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 22:07:49,528 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:07:49,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:07:49,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:07:49,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:07:49,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:07:49,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:07:49,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:07:49,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:07:49,533 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:07:49,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:07:49,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 22:07:49,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:07:49,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:07:49,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:07:49,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:07:49,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:07:49,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:07:49,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:07:49,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:07:49,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:07:49,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:07:49,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:07:49,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:07:49,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:07:49,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:07:49,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 22:07:49,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 22:07:49,538 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:07:49,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:07:49,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:07:49,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2022-07-19 22:07:49,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:07:49,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:07:49,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:07:49,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:07:49,748 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:07:49,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-07-19 22:07:49,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce97fb87a/c02e026da2324b20bbf42eae8543033e/FLAG7390bee7c [2022-07-19 22:07:50,466 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:07:50,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-07-19 22:07:50,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce97fb87a/c02e026da2324b20bbf42eae8543033e/FLAG7390bee7c [2022-07-19 22:07:50,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce97fb87a/c02e026da2324b20bbf42eae8543033e [2022-07-19 22:07:50,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:07:50,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:07:50,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:07:50,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:07:50,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:07:50,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:07:50" (1/1) ... [2022-07-19 22:07:50,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a53720c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:50, skipping insertion in model container [2022-07-19 22:07:50,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:07:50" (1/1) ... [2022-07-19 22:07:50,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:07:50,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:07:50,872 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-07-19 22:07:50,879 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-07-19 22:07:51,469 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,470 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,470 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,471 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,471 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,479 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,480 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,481 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,482 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,771 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:07:51,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:07:51,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:07:51,782 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:07:51,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:07:51,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:07:51,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:07:51,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:07:51,791 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:07:51,792 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:07:51,901 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:07:51,965 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:51,965 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,227 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,228 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,245 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,246 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,252 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,253 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,264 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,265 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,266 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,266 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,267 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,267 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,267 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:07:52,336 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 22:07:52,353 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-07-19 22:07:52,354 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-07-19 22:07:52,422 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,423 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,423 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,423 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,424 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,428 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,428 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,429 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,429 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,450 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:07:52,451 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:07:52,451 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:07:52,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:07:52,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:07:52,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:07:52,453 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:07:52,453 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:07:52,453 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:07:52,453 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:07:52,471 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:07:52,500 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,501 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,585 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,585 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,590 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,590 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,593 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,593 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,597 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,598 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,598 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,599 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,599 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:07:52,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:07:52,805 INFO L208 MainTranslator]: Completed translation [2022-07-19 22:07:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52 WrapperNode [2022-07-19 22:07:52,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 22:07:52,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 22:07:52,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 22:07:52,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 22:07:52,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:52,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:52,975 INFO L137 Inliner]: procedures = 776, calls = 3576, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 787 [2022-07-19 22:07:52,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 22:07:52,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 22:07:52,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 22:07:52,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 22:07:52,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:52,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:52,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:52,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:53,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:53,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:53,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:53,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 22:07:53,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 22:07:53,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 22:07:53,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 22:07:53,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (1/1) ... [2022-07-19 22:07:53,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:07:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:07:53,097 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) [2022-07-19 22:07:53,135 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 [2022-07-19 22:07:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-19 22:07:53,150 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-19 22:07:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 22:07:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 22:07:53,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 22:07:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 22:07:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 22:07:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 22:07:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 22:07:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 22:07:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-19 22:07:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-19 22:07:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 22:07:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 22:07:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2022-07-19 22:07:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2022-07-19 22:07:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 22:07:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-07-19 22:07:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-07-19 22:07:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 22:07:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 22:07:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 22:07:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 22:07:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 22:07:53,459 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 22:07:53,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 22:07:54,893 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2022-07-19 22:07:54,900 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 22:07:54,907 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 22:07:54,907 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 22:07:54,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:07:54 BoogieIcfgContainer [2022-07-19 22:07:54,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 22:07:54,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 22:07:54,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 22:07:54,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 22:07:54,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:07:50" (1/3) ... [2022-07-19 22:07:54,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eab9059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:07:54, skipping insertion in model container [2022-07-19 22:07:54,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:07:52" (2/3) ... [2022-07-19 22:07:54,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eab9059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:07:54, skipping insertion in model container [2022-07-19 22:07:54,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:07:54" (3/3) ... [2022-07-19 22:07:54,917 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2022-07-19 22:07:54,926 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 22:07:54,927 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 22:07:54,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 22:07:54,985 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@346847a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54efd9a [2022-07-19 22:07:54,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 22:07:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 22:07:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 22:07:54,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:07:54,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:07:54,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:07:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:07:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2022-07-19 22:07:55,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:07:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092456470] [2022-07-19 22:07:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:07:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:07:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:07:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:07:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 22:07:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:07:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:07:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 22:07:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:07:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 22:07:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:07:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092456470] [2022-07-19 22:07:55,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092456470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:07:55,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:07:55,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 22:07:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909065971] [2022-07-19 22:07:55,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:07:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 22:07:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:07:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 22:07:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 22:07:55,655 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:07:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:07:55,911 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2022-07-19 22:07:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 22:07:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-19 22:07:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:07:55,935 INFO L225 Difference]: With dead ends: 263 [2022-07-19 22:07:55,935 INFO L226 Difference]: Without dead ends: 128 [2022-07-19 22:07:55,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 22:07:55,954 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:07:55,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 267 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:07:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-19 22:07:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-07-19 22:07:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 22:07:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2022-07-19 22:07:56,005 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2022-07-19 22:07:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:07:56,005 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2022-07-19 22:07:56,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:07:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2022-07-19 22:07:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 22:07:56,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:07:56,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:07:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 22:07:56,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:07:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:07:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2022-07-19 22:07:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:07:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107962304] [2022-07-19 22:07:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:07:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:07:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:07:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:07:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 22:07:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:07:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:07:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 22:07:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:07:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 22:07:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:07:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107962304] [2022-07-19 22:07:56,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107962304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:07:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130015142] [2022-07-19 22:07:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:56,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:07:56,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:07:56,336 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) [2022-07-19 22:07:56,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 22:07:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 22:07:56,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:07:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 22:07:56,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:07:56,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130015142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:07:56,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:07:56,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-19 22:07:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845409953] [2022-07-19 22:07:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:07:56,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:07:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:07:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:07:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:07:56,897 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:07:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:07:57,007 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2022-07-19 22:07:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 22:07:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-19 22:07:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:07:57,013 INFO L225 Difference]: With dead ends: 239 [2022-07-19 22:07:57,013 INFO L226 Difference]: Without dead ends: 131 [2022-07-19 22:07:57,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:07:57,020 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 197 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:07:57,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 634 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:07:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-19 22:07:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-19 22:07:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-07-19 22:07:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-07-19 22:07:57,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2022-07-19 22:07:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:07:57,048 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-07-19 22:07:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:07:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-07-19 22:07:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 22:07:57,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:07:57,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:07:57,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 22:07:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:07:57,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:07:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:07:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2022-07-19 22:07:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:07:57,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474077365] [2022-07-19 22:07:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:07:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:07:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:07:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:07:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:07:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:07:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 22:07:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 22:07:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:07:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:07:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:07:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474077365] [2022-07-19 22:07:57,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474077365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:07:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502771643] [2022-07-19 22:07:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:07:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:07:57,634 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) [2022-07-19 22:07:57,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 22:07:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 22:07:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:07:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:07:58,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:07:58,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502771643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:07:58,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:07:58,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-07-19 22:07:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839354567] [2022-07-19 22:07:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:07:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:07:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:07:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:07:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:07:58,144 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:07:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:07:58,244 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2022-07-19 22:07:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:07:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-07-19 22:07:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:07:58,247 INFO L225 Difference]: With dead ends: 239 [2022-07-19 22:07:58,247 INFO L226 Difference]: Without dead ends: 131 [2022-07-19 22:07:58,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-19 22:07:58,251 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:07:58,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 794 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:07:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-19 22:07:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-19 22:07:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-19 22:07:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2022-07-19 22:07:58,265 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2022-07-19 22:07:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:07:58,265 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2022-07-19 22:07:58,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:07:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2022-07-19 22:07:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 22:07:58,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:07:58,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:07:58,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 22:07:58,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 22:07:58,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:07:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:07:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2022-07-19 22:07:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:07:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179616798] [2022-07-19 22:07:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:07:58,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:07:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:07:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:07:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:07:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:07:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:07:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:07:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:07:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 22:07:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:07:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:07:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:07:58,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179616798] [2022-07-19 22:07:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179616798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:07:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424133730] [2022-07-19 22:07:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 22:07:58,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:07:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:07:58,877 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) [2022-07-19 22:07:58,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 22:08:00,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 22:08:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:08:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 22:08:00,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:00,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:08:00,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424133730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:08:00,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:08:00,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 11 [2022-07-19 22:08:00,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230714146] [2022-07-19 22:08:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:08:00,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:08:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:08:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:08:00,121 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:08:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:00,171 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2022-07-19 22:08:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:08:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2022-07-19 22:08:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:00,174 INFO L225 Difference]: With dead ends: 158 [2022-07-19 22:08:00,175 INFO L226 Difference]: Without dead ends: 128 [2022-07-19 22:08:00,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:08:00,177 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 28 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:00,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1014 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:08:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-19 22:08:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-07-19 22:08:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 22:08:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2022-07-19 22:08:00,186 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2022-07-19 22:08:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:00,187 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2022-07-19 22:08:00,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:08:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2022-07-19 22:08:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 22:08:00,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:00,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:00,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:00,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2022-07-19 22:08:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095583971] [2022-07-19 22:08:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 22:08:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095583971] [2022-07-19 22:08:00,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095583971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971835429] [2022-07-19 22:08:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:00,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:00,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:00,784 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) [2022-07-19 22:08:00,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 22:08:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 22:08:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 22:08:01,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:08:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971835429] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:01,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:01,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2022-07-19 22:08:01,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248752315] [2022-07-19 22:08:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:08:01,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:08:01,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:08:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-07-19 22:08:01,543 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 22:08:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:01,612 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-07-19 22:08:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:08:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2022-07-19 22:08:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:01,614 INFO L225 Difference]: With dead ends: 140 [2022-07-19 22:08:01,614 INFO L226 Difference]: Without dead ends: 138 [2022-07-19 22:08:01,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:08:01,615 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 17 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:01,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1236 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:08:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-19 22:08:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-07-19 22:08:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.456140350877193) internal successors, (166), 116 states have internal predecessors, (166), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-19 22:08:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 197 transitions. [2022-07-19 22:08:01,640 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 197 transitions. Word has length 68 [2022-07-19 22:08:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:01,641 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 197 transitions. [2022-07-19 22:08:01,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 22:08:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 197 transitions. [2022-07-19 22:08:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 22:08:01,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:01,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:01,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:01,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2022-07-19 22:08:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:01,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860312521] [2022-07-19 22:08:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 22:08:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:02,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:02,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860312521] [2022-07-19 22:08:02,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860312521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:02,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149042669] [2022-07-19 22:08:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:02,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:02,232 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) [2022-07-19 22:08:02,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 22:08:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 22:08:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:02,648 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 [2022-07-19 22:08:03,274 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:08:03,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:08:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:03,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:03,578 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-19 22:08:03,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 111 [2022-07-19 22:08:03,600 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 8 treesize of output 7 [2022-07-19 22:08:03,626 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-19 22:08:03,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 22:08:03,662 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 12 treesize of output 11 [2022-07-19 22:08:03,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 35 [2022-07-19 22:08:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:04,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:04,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149042669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:04,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:04,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-07-19 22:08:04,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797995113] [2022-07-19 22:08:04,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:04,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:08:04,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:08:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1006, Unknown=5, NotChecked=0, Total=1122 [2022-07-19 22:08:04,328 INFO L87 Difference]: Start difference. First operand 137 states and 197 transitions. Second operand has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:05,786 INFO L93 Difference]: Finished difference Result 296 states and 424 transitions. [2022-07-19 22:08:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 22:08:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 72 [2022-07-19 22:08:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:05,789 INFO L225 Difference]: With dead ends: 296 [2022-07-19 22:08:05,790 INFO L226 Difference]: Without dead ends: 261 [2022-07-19 22:08:05,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=292, Invalid=2888, Unknown=12, NotChecked=0, Total=3192 [2022-07-19 22:08:05,792 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 174 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1660 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:05,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2825 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1201 Invalid, 0 Unknown, 1660 Unchecked, 0.8s Time] [2022-07-19 22:08:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-19 22:08:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 189. [2022-07-19 22:08:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 152 states have (on average 1.388157894736842) internal successors, (211), 157 states have internal predecessors, (211), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2022-07-19 22:08:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 262 transitions. [2022-07-19 22:08:05,818 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 262 transitions. Word has length 72 [2022-07-19 22:08:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:05,819 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 262 transitions. [2022-07-19 22:08:05,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 262 transitions. [2022-07-19 22:08:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 22:08:05,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:05,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:05,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:06,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:06,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2022-07-19 22:08:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770786265] [2022-07-19 22:08:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 22:08:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:06,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770786265] [2022-07-19 22:08:06,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770786265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659239380] [2022-07-19 22:08:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:06,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:06,337 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) [2022-07-19 22:08:06,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 22:08:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:06,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 22:08:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:06,777 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 [2022-07-19 22:08:07,346 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:08:07,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:08:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:07,635 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-19 22:08:07,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-07-19 22:08:07,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:08:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:07,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:07,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659239380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:07,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:07,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:08:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134775073] [2022-07-19 22:08:07,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:07,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:08:07,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:08:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:08:07,938 INFO L87 Difference]: Start difference. First operand 189 states and 262 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:09,123 INFO L93 Difference]: Finished difference Result 302 states and 427 transitions. [2022-07-19 22:08:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:08:09,124 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 73 [2022-07-19 22:08:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:09,126 INFO L225 Difference]: With dead ends: 302 [2022-07-19 22:08:09,126 INFO L226 Difference]: Without dead ends: 267 [2022-07-19 22:08:09,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=1938, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 22:08:09,129 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 153 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1892 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:09,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2531 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1062 Invalid, 0 Unknown, 1892 Unchecked, 0.8s Time] [2022-07-19 22:08:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-19 22:08:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 195. [2022-07-19 22:08:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 161 states have internal predecessors, (216), 23 states have call successors, (23), 12 states have call predecessors, (23), 15 states have return successors, (30), 21 states have call predecessors, (30), 22 states have call successors, (30) [2022-07-19 22:08:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 269 transitions. [2022-07-19 22:08:09,146 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 269 transitions. Word has length 73 [2022-07-19 22:08:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:09,146 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 269 transitions. [2022-07-19 22:08:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 269 transitions. [2022-07-19 22:08:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 22:08:09,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:09,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:09,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:09,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:09,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2022-07-19 22:08:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474465724] [2022-07-19 22:08:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 22:08:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:09,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474465724] [2022-07-19 22:08:09,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474465724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:09,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253558182] [2022-07-19 22:08:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:09,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:09,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:09,773 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) [2022-07-19 22:08:09,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 22:08:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 22:08:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:10,569 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 17 treesize of output 9 [2022-07-19 22:08:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:10,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:10,827 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 22:08:10,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 22:08:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253558182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:08:10,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:08:10,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2022-07-19 22:08:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940541449] [2022-07-19 22:08:10,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:08:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:08:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:08:10,837 INFO L87 Difference]: Start difference. First operand 195 states and 269 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 22:08:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:13,446 INFO L93 Difference]: Finished difference Result 396 states and 575 transitions. [2022-07-19 22:08:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:08:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2022-07-19 22:08:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:13,449 INFO L225 Difference]: With dead ends: 396 [2022-07-19 22:08:13,449 INFO L226 Difference]: Without dead ends: 361 [2022-07-19 22:08:13,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 22:08:13,451 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 525 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 3861 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 4236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:13,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 2276 Invalid, 4236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3861 Invalid, 0 Unknown, 325 Unchecked, 2.0s Time] [2022-07-19 22:08:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-07-19 22:08:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 266. [2022-07-19 22:08:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 224 states have (on average 1.4464285714285714) internal successors, (324), 229 states have internal predecessors, (324), 24 states have call successors, (24), 14 states have call predecessors, (24), 17 states have return successors, (31), 22 states have call predecessors, (31), 23 states have call successors, (31) [2022-07-19 22:08:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 379 transitions. [2022-07-19 22:08:13,481 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 379 transitions. Word has length 73 [2022-07-19 22:08:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:13,482 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 379 transitions. [2022-07-19 22:08:13,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 22:08:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 379 transitions. [2022-07-19 22:08:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 22:08:13,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:13,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:13,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:13,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2022-07-19 22:08:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094069516] [2022-07-19 22:08:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:08:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:14,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094069516] [2022-07-19 22:08:14,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094069516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501120023] [2022-07-19 22:08:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:14,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:14,018 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) [2022-07-19 22:08:14,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 22:08:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:14,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 22:08:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:14,459 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 [2022-07-19 22:08:15,023 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:08:15,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:08:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:15,339 INFO L356 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-07-19 22:08:15,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 103 [2022-07-19 22:08:15,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:08:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:15,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501120023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:15,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:08:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076958633] [2022-07-19 22:08:15,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:15,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:08:15,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:08:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:08:15,626 INFO L87 Difference]: Start difference. First operand 266 states and 379 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:16,743 INFO L93 Difference]: Finished difference Result 317 states and 445 transitions. [2022-07-19 22:08:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:08:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2022-07-19 22:08:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:16,744 INFO L225 Difference]: With dead ends: 317 [2022-07-19 22:08:16,745 INFO L226 Difference]: Without dead ends: 282 [2022-07-19 22:08:16,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1927, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 22:08:16,746 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 60 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:16,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1769 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1098 Invalid, 0 Unknown, 393 Unchecked, 0.7s Time] [2022-07-19 22:08:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-19 22:08:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 266. [2022-07-19 22:08:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 224 states have (on average 1.4464285714285714) internal successors, (324), 229 states have internal predecessors, (324), 24 states have call successors, (24), 14 states have call predecessors, (24), 17 states have return successors, (31), 22 states have call predecessors, (31), 23 states have call successors, (31) [2022-07-19 22:08:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 379 transitions. [2022-07-19 22:08:16,763 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 379 transitions. Word has length 74 [2022-07-19 22:08:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:16,764 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 379 transitions. [2022-07-19 22:08:16,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 379 transitions. [2022-07-19 22:08:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 22:08:16,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:16,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:16,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:16,979 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,SelfDestructingSolverStorable8 [2022-07-19 22:08:16,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2022-07-19 22:08:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:16,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465494203] [2022-07-19 22:08:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:08:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:17,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465494203] [2022-07-19 22:08:17,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465494203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265071968] [2022-07-19 22:08:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:17,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:17,288 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) [2022-07-19 22:08:17,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 22:08:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-19 22:08:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:17,714 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 [2022-07-19 22:08:18,303 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-19 22:08:18,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2022-07-19 22:08:27,548 WARN L855 $PredicateComparison]: unable to prove that (exists ((|hashlittle2_~#u~1.base| Int) (v_ArrVal_1189 (Array Int Int)) (aux_div_v_ArrVal_1186_40 Int) (v_ArrVal_1188 (Array Int Int))) (= (store (store (store |c_old(#memory_int)| |hashlittle2_~#u~1.base| (store (select |c_old(#memory_int)| |hashlittle2_~#u~1.base|) 0 (* 18446744073709551616 aux_div_v_ArrVal_1186_40))) |c_hashlittle2_#in~pc.base| v_ArrVal_1188) |c_hashlittle2_#in~pb.base| v_ArrVal_1189) |c_#memory_int|)) is different from true [2022-07-19 22:08:27,609 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-07-19 22:08:27,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 35 [2022-07-19 22:08:27,629 INFO L356 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-07-19 22:08:27,629 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 2 case distinctions, treesize of input 32 treesize of output 46 [2022-07-19 22:08:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:27,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:28,265 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_hashlittle2_~#u~1.base_30| Int) (aux_div_v_ArrVal_1199_40 Int) (v_ArrVal_1198 (Array Int Int)) (v_ArrVal_1197 (Array Int Int))) (= (mod (select (select (store (store (store |c_#memory_int| |v_hashlittle2_~#u~1.base_30| (store (select |c_#memory_int| |v_hashlittle2_~#u~1.base_30|) 0 (* 18446744073709551616 aux_div_v_ArrVal_1199_40))) |c_ULTIMATE.start_aws_hash_byte_cursor_ptr_~#c~9#1.base| v_ArrVal_1198) |c_ULTIMATE.start_aws_hash_byte_cursor_ptr_~#b~7#1.base| v_ArrVal_1197) |c_ULTIMATE.start_aws_hash_byte_cursor_ptr_~cur~3#1.base|) |c_ULTIMATE.start_aws_hash_byte_cursor_ptr_~cur~3#1.offset|) 18446744073709551616) 0)) is different from false [2022-07-19 22:08:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265071968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:28,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:28,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 31 [2022-07-19 22:08:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511283890] [2022-07-19 22:08:28,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 22:08:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 22:08:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1011, Unknown=6, NotChecked=130, Total=1260 [2022-07-19 22:08:28,268 INFO L87 Difference]: Start difference. First operand 266 states and 379 transitions. Second operand has 31 states, 29 states have (on average 3.310344827586207) internal successors, (96), 26 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:45,997 INFO L93 Difference]: Finished difference Result 377 states and 539 transitions. [2022-07-19 22:08:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 22:08:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.310344827586207) internal successors, (96), 26 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 74 [2022-07-19 22:08:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:46,000 INFO L225 Difference]: With dead ends: 377 [2022-07-19 22:08:46,000 INFO L226 Difference]: Without dead ends: 342 [2022-07-19 22:08:46,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=309, Invalid=3107, Unknown=14, NotChecked=230, Total=3660 [2022-07-19 22:08:46,002 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 112 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1920 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:46,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 2701 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1342 Invalid, 0 Unknown, 1920 Unchecked, 0.8s Time] [2022-07-19 22:08:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-19 22:08:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 266. [2022-07-19 22:08:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 224 states have (on average 1.4464285714285714) internal successors, (324), 229 states have internal predecessors, (324), 24 states have call successors, (24), 14 states have call predecessors, (24), 17 states have return successors, (31), 22 states have call predecessors, (31), 23 states have call successors, (31) [2022-07-19 22:08:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 379 transitions. [2022-07-19 22:08:46,015 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 379 transitions. Word has length 74 [2022-07-19 22:08:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:46,016 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 379 transitions. [2022-07-19 22:08:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.310344827586207) internal successors, (96), 26 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 379 transitions. [2022-07-19 22:08:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 22:08:46,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:46,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:46,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 22:08:46,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2022-07-19 22:08:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949355947] [2022-07-19 22:08:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:46,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:08:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:46,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949355947] [2022-07-19 22:08:46,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949355947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:46,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338150887] [2022-07-19 22:08:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:46,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:46,544 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) [2022-07-19 22:08:46,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 22:08:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 22:08:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:47,036 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 [2022-07-19 22:08:47,653 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:08:47,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:08:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:47,999 INFO L356 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-07-19 22:08:48,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 103 [2022-07-19 22:08:48,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:08:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:48,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:48,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338150887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:48,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:48,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:08:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074595771] [2022-07-19 22:08:48,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:08:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:08:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:08:48,329 INFO L87 Difference]: Start difference. First operand 266 states and 379 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:49,504 INFO L93 Difference]: Finished difference Result 326 states and 464 transitions. [2022-07-19 22:08:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 22:08:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2022-07-19 22:08:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:49,506 INFO L225 Difference]: With dead ends: 326 [2022-07-19 22:08:49,506 INFO L226 Difference]: Without dead ends: 291 [2022-07-19 22:08:49,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=2020, Unknown=1, NotChecked=0, Total=2256 [2022-07-19 22:08:49,508 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 63 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 761 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:49,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1830 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 998 Invalid, 0 Unknown, 761 Unchecked, 0.7s Time] [2022-07-19 22:08:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-19 22:08:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 266. [2022-07-19 22:08:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 224 states have (on average 1.4464285714285714) internal successors, (324), 229 states have internal predecessors, (324), 24 states have call successors, (24), 14 states have call predecessors, (24), 17 states have return successors, (31), 22 states have call predecessors, (31), 23 states have call successors, (31) [2022-07-19 22:08:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 379 transitions. [2022-07-19 22:08:49,523 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 379 transitions. Word has length 75 [2022-07-19 22:08:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:49,523 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 379 transitions. [2022-07-19 22:08:49,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 379 transitions. [2022-07-19 22:08:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 22:08:49,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:49,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:49,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:49,725 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,SelfDestructingSolverStorable10 [2022-07-19 22:08:49,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2022-07-19 22:08:49,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:49,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450143290] [2022-07-19 22:08:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:49,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:50,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 22:08:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:50,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450143290] [2022-07-19 22:08:50,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450143290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249689340] [2022-07-19 22:08:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:50,049 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) [2022-07-19 22:08:50,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 22:08:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 22:08:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:50,517 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 [2022-07-19 22:08:51,004 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:08:51,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:08:51,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:08:51,260 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:08:51,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-07-19 22:08:51,280 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-19 22:08:51,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 22:08:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:08:51,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:51,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249689340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:51,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:51,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-07-19 22:08:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439598909] [2022-07-19 22:08:51,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:51,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:08:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:08:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1011, Unknown=3, NotChecked=0, Total=1122 [2022-07-19 22:08:51,884 INFO L87 Difference]: Start difference. First operand 266 states and 379 transitions. Second operand has 29 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:52,712 INFO L93 Difference]: Finished difference Result 323 states and 452 transitions. [2022-07-19 22:08:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 22:08:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) Word has length 76 [2022-07-19 22:08:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:52,715 INFO L225 Difference]: With dead ends: 323 [2022-07-19 22:08:52,715 INFO L226 Difference]: Without dead ends: 288 [2022-07-19 22:08:52,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=2134, Unknown=10, NotChecked=0, Total=2352 [2022-07-19 22:08:52,716 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 81 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:52,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1845 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 555 Invalid, 0 Unknown, 790 Unchecked, 0.4s Time] [2022-07-19 22:08:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-19 22:08:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 261. [2022-07-19 22:08:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 221 states have (on average 1.4524886877828054) internal successors, (321), 225 states have internal predecessors, (321), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-19 22:08:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 373 transitions. [2022-07-19 22:08:52,728 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 373 transitions. Word has length 76 [2022-07-19 22:08:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:52,729 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 373 transitions. [2022-07-19 22:08:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:08:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 373 transitions. [2022-07-19 22:08:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 22:08:52,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:52,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:52,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:52,959 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,SelfDestructingSolverStorable11 [2022-07-19 22:08:52,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674049, now seen corresponding path program 1 times [2022-07-19 22:08:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:52,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019255471] [2022-07-19 22:08:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:08:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:53,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019255471] [2022-07-19 22:08:53,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019255471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193200121] [2022-07-19 22:08:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:53,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:53,262 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) [2022-07-19 22:08:53,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 22:08:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-19 22:08:53,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:53,701 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 [2022-07-19 22:08:54,250 INFO L356 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2022-07-19 22:08:54,251 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 4 case distinctions, treesize of input 20 treesize of output 34 [2022-07-19 22:08:54,587 INFO L356 Elim1Store]: treesize reduction 97, result has 1.0 percent of original size [2022-07-19 22:08:54,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 36 treesize of output 23 [2022-07-19 22:08:54,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:08:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:08:54,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:08:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193200121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:54,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:08:54,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:08:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178264655] [2022-07-19 22:08:54,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:08:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:08:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:08:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:08:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:08:54,873 INFO L87 Difference]: Start difference. First operand 261 states and 373 transitions. Second operand has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:08:55,995 INFO L93 Difference]: Finished difference Result 326 states and 464 transitions. [2022-07-19 22:08:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:08:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-07-19 22:08:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:08:55,997 INFO L225 Difference]: With dead ends: 326 [2022-07-19 22:08:55,997 INFO L226 Difference]: Without dead ends: 291 [2022-07-19 22:08:55,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=1943, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 22:08:55,999 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 78 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:08:55,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1601 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 944 Invalid, 0 Unknown, 459 Unchecked, 0.7s Time] [2022-07-19 22:08:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-19 22:08:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 261. [2022-07-19 22:08:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 221 states have (on average 1.4524886877828054) internal successors, (321), 225 states have internal predecessors, (321), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-19 22:08:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 373 transitions. [2022-07-19 22:08:56,013 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 373 transitions. Word has length 77 [2022-07-19 22:08:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:08:56,013 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 373 transitions. [2022-07-19 22:08:56,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:08:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 373 transitions. [2022-07-19 22:08:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 22:08:56,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:08:56,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:08:56,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 22:08:56,239 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,SelfDestructingSolverStorable12 [2022-07-19 22:08:56,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:08:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:08:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1265263437, now seen corresponding path program 1 times [2022-07-19 22:08:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:08:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598250779] [2022-07-19 22:08:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:08:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:08:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:08:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:08:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:08:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:08:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:08:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:08:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:08:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:08:56,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:08:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598250779] [2022-07-19 22:08:56,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598250779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:08:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463108784] [2022-07-19 22:08:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:08:56,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:08:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:08:56,581 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) [2022-07-19 22:08:56,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 22:08:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:08:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 22:08:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:08:57,030 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 [2022-07-19 22:08:57,580 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 22:08:57,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 22:09:03,550 INFO L356 Elim1Store]: treesize reduction 139, result has 0.7 percent of original size [2022-07-19 22:09:03,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 25 [2022-07-19 22:09:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:03,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:03,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463108784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:03,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:03,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2022-07-19 22:09:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48923359] [2022-07-19 22:09:03,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:09:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:09:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1017, Unknown=5, NotChecked=0, Total=1122 [2022-07-19 22:09:03,924 INFO L87 Difference]: Start difference. First operand 261 states and 373 transitions. Second operand has 29 states, 27 states have (on average 3.740740740740741) internal successors, (101), 25 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:09,232 INFO L93 Difference]: Finished difference Result 356 states and 502 transitions. [2022-07-19 22:09:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 22:09:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.740740740740741) internal successors, (101), 25 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-07-19 22:09:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:09,235 INFO L225 Difference]: With dead ends: 356 [2022-07-19 22:09:09,235 INFO L226 Difference]: Without dead ends: 321 [2022-07-19 22:09:09,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=276, Invalid=2795, Unknown=9, NotChecked=0, Total=3080 [2022-07-19 22:09:09,237 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 153 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 774 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:09,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1311 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1139 Invalid, 0 Unknown, 774 Unchecked, 0.7s Time] [2022-07-19 22:09:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-19 22:09:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 263. [2022-07-19 22:09:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 223 states have (on average 1.452914798206278) internal successors, (324), 227 states have internal predecessors, (324), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-19 22:09:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 376 transitions. [2022-07-19 22:09:09,251 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 376 transitions. Word has length 77 [2022-07-19 22:09:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:09,252 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 376 transitions. [2022-07-19 22:09:09,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.740740740740741) internal successors, (101), 25 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 376 transitions. [2022-07-19 22:09:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 22:09:09,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:09,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:09,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:09,472 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,SelfDestructingSolverStorable13 [2022-07-19 22:09:09,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1399276943, now seen corresponding path program 1 times [2022-07-19 22:09:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:09,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714908607] [2022-07-19 22:09:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:09:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:09,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714908607] [2022-07-19 22:09:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714908607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638994465] [2022-07-19 22:09:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:09,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:09,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:09,758 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) [2022-07-19 22:09:09,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 22:09:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-19 22:09:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:10,230 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 [2022-07-19 22:09:10,765 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 22:09:10,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 22:09:17,843 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-07-19 22:09:17,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 30 [2022-07-19 22:09:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:17,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638994465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:18,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:18,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2022-07-19 22:09:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792802239] [2022-07-19 22:09:18,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 22:09:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 22:09:18,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1076, Unknown=5, NotChecked=0, Total=1190 [2022-07-19 22:09:18,160 INFO L87 Difference]: Start difference. First operand 263 states and 376 transitions. Second operand has 30 states, 28 states have (on average 3.607142857142857) internal successors, (101), 26 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:21,163 INFO L93 Difference]: Finished difference Result 347 states and 483 transitions. [2022-07-19 22:09:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 22:09:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.607142857142857) internal successors, (101), 26 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-07-19 22:09:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:21,165 INFO L225 Difference]: With dead ends: 347 [2022-07-19 22:09:21,165 INFO L226 Difference]: Without dead ends: 312 [2022-07-19 22:09:21,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=232, Invalid=2312, Unknown=6, NotChecked=0, Total=2550 [2022-07-19 22:09:21,166 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 141 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 896 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:21,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1306 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1010 Invalid, 0 Unknown, 896 Unchecked, 0.6s Time] [2022-07-19 22:09:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-19 22:09:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 261. [2022-07-19 22:09:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 221 states have (on average 1.4524886877828054) internal successors, (321), 225 states have internal predecessors, (321), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-19 22:09:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 373 transitions. [2022-07-19 22:09:21,178 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 373 transitions. Word has length 77 [2022-07-19 22:09:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:21,179 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 373 transitions. [2022-07-19 22:09:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.607142857142857) internal successors, (101), 26 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 373 transitions. [2022-07-19 22:09:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 22:09:21,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:21,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:21,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 22:09:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:21,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1085154871, now seen corresponding path program 1 times [2022-07-19 22:09:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:21,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547726616] [2022-07-19 22:09:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-19 22:09:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:21,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547726616] [2022-07-19 22:09:21,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547726616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870027581] [2022-07-19 22:09:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:21,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:21,668 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) [2022-07-19 22:09:21,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 22:09:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-19 22:09:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:22,180 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 [2022-07-19 22:09:22,674 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-19 22:09:22,674 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 2 case distinctions, treesize of input 15 treesize of output 30 [2022-07-19 22:09:23,031 INFO L356 Elim1Store]: treesize reduction 258, result has 0.4 percent of original size [2022-07-19 22:09:23,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 82 [2022-07-19 22:09:23,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:09:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:09:23,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:09:23,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870027581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:09:23,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:09:23,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [12] total 26 [2022-07-19 22:09:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730188607] [2022-07-19 22:09:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:09:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:09:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:09:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=576, Unknown=1, NotChecked=0, Total=650 [2022-07-19 22:09:23,041 INFO L87 Difference]: Start difference. First operand 261 states and 373 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:23,303 INFO L93 Difference]: Finished difference Result 314 states and 438 transitions. [2022-07-19 22:09:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:09:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 78 [2022-07-19 22:09:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:23,322 INFO L225 Difference]: With dead ends: 314 [2022-07-19 22:09:23,322 INFO L226 Difference]: Without dead ends: 279 [2022-07-19 22:09:23,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=774, Unknown=1, NotChecked=0, Total=870 [2022-07-19 22:09:23,323 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 40 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 709 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 796 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 159 Invalid, 0 Unknown, 709 Unchecked, 0.2s Time] [2022-07-19 22:09:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-19 22:09:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2022-07-19 22:09:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 231 states have (on average 1.432900432900433) internal successors, (331), 237 states have internal predecessors, (331), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 390 transitions. [2022-07-19 22:09:23,341 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 390 transitions. Word has length 78 [2022-07-19 22:09:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:23,341 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 390 transitions. [2022-07-19 22:09:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 390 transitions. [2022-07-19 22:09:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 22:09:23,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:23,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:23,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:23,559 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,SelfDestructingSolverStorable15 [2022-07-19 22:09:23,559 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1452243686, now seen corresponding path program 1 times [2022-07-19 22:09:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502881486] [2022-07-19 22:09:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 22:09:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502881486] [2022-07-19 22:09:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502881486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645456525] [2022-07-19 22:09:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:23,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:23,818 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) [2022-07-19 22:09:23,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 22:09:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:24,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-19 22:09:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:24,302 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 [2022-07-19 22:09:24,818 INFO L356 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2022-07-19 22:09:24,819 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 4 case distinctions, treesize of input 20 treesize of output 34 [2022-07-19 22:09:25,141 INFO L356 Elim1Store]: treesize reduction 97, result has 1.0 percent of original size [2022-07-19 22:09:25,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 36 treesize of output 23 [2022-07-19 22:09:25,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:09:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:25,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:25,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645456525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:25,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:25,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:09:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13480672] [2022-07-19 22:09:25,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:09:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:09:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:09:25,410 INFO L87 Difference]: Start difference. First operand 276 states and 390 transitions. Second operand has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:26,562 INFO L93 Difference]: Finished difference Result 383 states and 550 transitions. [2022-07-19 22:09:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 22:09:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 79 [2022-07-19 22:09:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:26,564 INFO L225 Difference]: With dead ends: 383 [2022-07-19 22:09:26,564 INFO L226 Difference]: Without dead ends: 348 [2022-07-19 22:09:26,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=246, Invalid=2105, Unknown=1, NotChecked=0, Total=2352 [2022-07-19 22:09:26,565 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 201 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1678 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:26,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 2283 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1011 Invalid, 0 Unknown, 1678 Unchecked, 0.6s Time] [2022-07-19 22:09:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-19 22:09:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 276. [2022-07-19 22:09:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 231 states have (on average 1.432900432900433) internal successors, (331), 237 states have internal predecessors, (331), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 390 transitions. [2022-07-19 22:09:26,579 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 390 transitions. Word has length 79 [2022-07-19 22:09:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:26,580 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 390 transitions. [2022-07-19 22:09:26,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 390 transitions. [2022-07-19 22:09:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 22:09:26,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:26,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:26,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 22:09:26,801 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1547441916, now seen corresponding path program 1 times [2022-07-19 22:09:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674798361] [2022-07-19 22:09:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:27,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:09:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:27,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674798361] [2022-07-19 22:09:27,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674798361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269968475] [2022-07-19 22:09:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:27,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:27,077 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) [2022-07-19 22:09:27,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 22:09:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-19 22:09:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:27,573 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 [2022-07-19 22:09:28,045 INFO L356 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-07-19 22:09:28,046 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 24 treesize of output 30 [2022-07-19 22:09:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:09:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:09:28,409 INFO L356 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-07-19 22:09:28,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 28 [2022-07-19 22:09:28,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:09:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:09:28,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:09:28,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269968475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:09:28,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:09:28,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [12] total 26 [2022-07-19 22:09:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239075327] [2022-07-19 22:09:28,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:09:28,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:09:28,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:09:28,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=574, Unknown=1, NotChecked=0, Total=650 [2022-07-19 22:09:28,417 INFO L87 Difference]: Start difference. First operand 276 states and 390 transitions. Second operand has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:28,624 INFO L93 Difference]: Finished difference Result 367 states and 518 transitions. [2022-07-19 22:09:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:09:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 80 [2022-07-19 22:09:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:28,625 INFO L225 Difference]: With dead ends: 367 [2022-07-19 22:09:28,626 INFO L226 Difference]: Without dead ends: 332 [2022-07-19 22:09:28,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=772, Unknown=1, NotChecked=0, Total=870 [2022-07-19 22:09:28,626 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 112 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1011 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:28,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 877 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 1011 Unchecked, 0.1s Time] [2022-07-19 22:09:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-19 22:09:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2022-07-19 22:09:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 231 states have (on average 1.432900432900433) internal successors, (331), 237 states have internal predecessors, (331), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 390 transitions. [2022-07-19 22:09:28,643 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 390 transitions. Word has length 80 [2022-07-19 22:09:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:28,643 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 390 transitions. [2022-07-19 22:09:28,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 390 transitions. [2022-07-19 22:09:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 22:09:28,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:28,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:28,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 22:09:28,856 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -236206099, now seen corresponding path program 1 times [2022-07-19 22:09:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295453213] [2022-07-19 22:09:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:09:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 22:09:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295453213] [2022-07-19 22:09:28,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295453213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:09:28,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:09:28,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:09:28,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637502082] [2022-07-19 22:09:28,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:09:28,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:09:28,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:28,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:09:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:09:28,999 INFO L87 Difference]: Start difference. First operand 276 states and 390 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:09:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:29,218 INFO L93 Difference]: Finished difference Result 373 states and 527 transitions. [2022-07-19 22:09:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 22:09:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-07-19 22:09:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:29,220 INFO L225 Difference]: With dead ends: 373 [2022-07-19 22:09:29,220 INFO L226 Difference]: Without dead ends: 302 [2022-07-19 22:09:29,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:09:29,221 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 32 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:29,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 363 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:09:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-19 22:09:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 294. [2022-07-19 22:09:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 249 states have (on average 1.4016064257028114) internal successors, (349), 255 states have internal predecessors, (349), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 408 transitions. [2022-07-19 22:09:29,237 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 408 transitions. Word has length 80 [2022-07-19 22:09:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:29,237 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 408 transitions. [2022-07-19 22:09:29,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:09:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 408 transitions. [2022-07-19 22:09:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 22:09:29,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:29,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 22:09:29,239 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1687021935, now seen corresponding path program 1 times [2022-07-19 22:09:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054720959] [2022-07-19 22:09:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:09:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054720959] [2022-07-19 22:09:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054720959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81721246] [2022-07-19 22:09:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:29,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:29,520 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) [2022-07-19 22:09:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 22:09:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 22:09:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:30,014 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 [2022-07-19 22:09:30,559 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-19 22:09:30,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2022-07-19 22:09:34,598 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-07-19 22:09:34,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-07-19 22:09:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:34,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81721246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:34,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:34,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2022-07-19 22:09:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604882131] [2022-07-19 22:09:34,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:09:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:09:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1017, Unknown=5, NotChecked=0, Total=1122 [2022-07-19 22:09:34,945 INFO L87 Difference]: Start difference. First operand 294 states and 408 transitions. Second operand has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 25 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:40,359 INFO L93 Difference]: Finished difference Result 372 states and 532 transitions. [2022-07-19 22:09:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 22:09:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 25 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 80 [2022-07-19 22:09:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:40,361 INFO L225 Difference]: With dead ends: 372 [2022-07-19 22:09:40,362 INFO L226 Difference]: Without dead ends: 337 [2022-07-19 22:09:40,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=242, Invalid=2507, Unknown=7, NotChecked=0, Total=2756 [2022-07-19 22:09:40,363 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 114 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 943 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:40,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1534 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1290 Invalid, 0 Unknown, 943 Unchecked, 0.9s Time] [2022-07-19 22:09:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-19 22:09:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 292. [2022-07-19 22:09:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 247 states have (on average 1.4048582995951417) internal successors, (347), 253 states have internal predecessors, (347), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2022-07-19 22:09:40,380 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 80 [2022-07-19 22:09:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:40,380 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2022-07-19 22:09:40,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 25 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2022-07-19 22:09:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 22:09:40,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:40,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:40,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:40,621 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1553008429, now seen corresponding path program 1 times [2022-07-19 22:09:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351127727] [2022-07-19 22:09:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:09:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351127727] [2022-07-19 22:09:40,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351127727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762983844] [2022-07-19 22:09:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:40,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:40,916 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) [2022-07-19 22:09:40,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 22:09:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-19 22:09:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:41,462 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 [2022-07-19 22:09:41,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 22:09:41,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 22:09:48,372 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-07-19 22:09:48,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 30 [2022-07-19 22:09:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:48,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:48,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762983844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:48,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:48,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2022-07-19 22:09:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713520468] [2022-07-19 22:09:48,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:48,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 22:09:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:48,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 22:09:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1076, Unknown=5, NotChecked=0, Total=1190 [2022-07-19 22:09:48,693 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand has 30 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 26 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:51,542 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2022-07-19 22:09:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 22:09:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 26 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 80 [2022-07-19 22:09:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:51,545 INFO L225 Difference]: With dead ends: 355 [2022-07-19 22:09:51,545 INFO L226 Difference]: Without dead ends: 320 [2022-07-19 22:09:51,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=242, Invalid=2404, Unknown=6, NotChecked=0, Total=2652 [2022-07-19 22:09:51,546 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 104 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1045 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:51,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1310 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 966 Invalid, 0 Unknown, 1045 Unchecked, 0.7s Time] [2022-07-19 22:09:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-19 22:09:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 292. [2022-07-19 22:09:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 247 states have (on average 1.4048582995951417) internal successors, (347), 253 states have internal predecessors, (347), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-07-19 22:09:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2022-07-19 22:09:51,565 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 80 [2022-07-19 22:09:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:51,565 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2022-07-19 22:09:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 26 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2022-07-19 22:09:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 22:09:51,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:51,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:51,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:51,794 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 105103528, now seen corresponding path program 1 times [2022-07-19 22:09:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:51,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558985687] [2022-07-19 22:09:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:09:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:09:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:09:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:09:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:09:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 22:09:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558985687] [2022-07-19 22:09:52,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558985687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651131749] [2022-07-19 22:09:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:52,248 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) [2022-07-19 22:09:52,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 22:09:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 22:09:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:09:52,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:09:52,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651131749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:09:52,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:09:52,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-07-19 22:09:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326267693] [2022-07-19 22:09:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:09:52,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:09:52,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:09:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:09:52,823 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:09:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:52,913 INFO L93 Difference]: Finished difference Result 509 states and 728 transitions. [2022-07-19 22:09:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:09:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 80 [2022-07-19 22:09:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:52,918 INFO L225 Difference]: With dead ends: 509 [2022-07-19 22:09:52,918 INFO L226 Difference]: Without dead ends: 302 [2022-07-19 22:09:52,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:09:52,920 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:52,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1429 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:09:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-19 22:09:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 297. [2022-07-19 22:09:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 251 states have (on average 1.3984063745019921) internal successors, (351), 258 states have internal predecessors, (351), 25 states have call successors, (25), 15 states have call predecessors, (25), 20 states have return successors, (38), 23 states have call predecessors, (38), 24 states have call successors, (38) [2022-07-19 22:09:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2022-07-19 22:09:52,939 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 80 [2022-07-19 22:09:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:52,939 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2022-07-19 22:09:52,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:09:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2022-07-19 22:09:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:09:52,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:52,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:52,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:53,158 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,SelfDestructingSolverStorable21 [2022-07-19 22:09:53,158 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1803966603, now seen corresponding path program 1 times [2022-07-19 22:09:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872491987] [2022-07-19 22:09:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:09:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:53,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872491987] [2022-07-19 22:09:53,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872491987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786852908] [2022-07-19 22:09:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:53,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:53,441 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) [2022-07-19 22:09:53,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 22:09:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 22:09:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:54,013 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 [2022-07-19 22:09:54,577 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:09:54,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:09:54,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:09:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:09:54,971 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-19 22:09:54,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-07-19 22:09:54,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:09:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:09:54,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:09:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786852908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:55,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:09:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:09:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558741874] [2022-07-19 22:09:55,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:09:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:09:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:09:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:09:55,256 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:56,394 INFO L93 Difference]: Finished difference Result 362 states and 511 transitions. [2022-07-19 22:09:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 22:09:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 81 [2022-07-19 22:09:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:56,396 INFO L225 Difference]: With dead ends: 362 [2022-07-19 22:09:56,397 INFO L226 Difference]: Without dead ends: 322 [2022-07-19 22:09:56,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=262, Invalid=2187, Unknown=1, NotChecked=0, Total=2450 [2022-07-19 22:09:56,399 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 91 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:56,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1665 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 869 Invalid, 0 Unknown, 587 Unchecked, 0.6s Time] [2022-07-19 22:09:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-07-19 22:09:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 297. [2022-07-19 22:09:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 251 states have (on average 1.3984063745019921) internal successors, (351), 258 states have internal predecessors, (351), 25 states have call successors, (25), 15 states have call predecessors, (25), 20 states have return successors, (38), 23 states have call predecessors, (38), 24 states have call successors, (38) [2022-07-19 22:09:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2022-07-19 22:09:56,417 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 81 [2022-07-19 22:09:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:56,417 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2022-07-19 22:09:56,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:09:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2022-07-19 22:09:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:09:56,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:56,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:56,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 22:09:56,639 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,SelfDestructingSolverStorable22 [2022-07-19 22:09:56,639 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash -384834745, now seen corresponding path program 1 times [2022-07-19 22:09:56,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424584111] [2022-07-19 22:09:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:56,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:56,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:09:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424584111] [2022-07-19 22:09:57,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424584111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:09:57,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:09:57,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 22:09:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253689394] [2022-07-19 22:09:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:09:57,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 22:09:57,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:09:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 22:09:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:09:57,231 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:09:58,646 INFO L93 Difference]: Finished difference Result 357 states and 500 transitions. [2022-07-19 22:09:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:09:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 82 [2022-07-19 22:09:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:09:58,648 INFO L225 Difference]: With dead ends: 357 [2022-07-19 22:09:58,648 INFO L226 Difference]: Without dead ends: 324 [2022-07-19 22:09:58,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-19 22:09:58,649 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 166 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:09:58,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 480 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 22:09:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-19 22:09:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 310. [2022-07-19 22:09:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 256 states have (on average 1.390625) internal successors, (356), 264 states have internal predecessors, (356), 32 states have call successors, (32), 15 states have call predecessors, (32), 21 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2022-07-19 22:09:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 443 transitions. [2022-07-19 22:09:58,667 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 443 transitions. Word has length 82 [2022-07-19 22:09:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:09:58,667 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 443 transitions. [2022-07-19 22:09:58,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:09:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 443 transitions. [2022-07-19 22:09:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:09:58,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:09:58,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:09:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 22:09:58,669 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:09:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:09:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1528323135, now seen corresponding path program 1 times [2022-07-19 22:09:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:09:58,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868295971] [2022-07-19 22:09:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:58,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:09:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:09:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:09:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:09:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:09:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:09:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:09:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:09:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:09:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:09:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:09:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868295971] [2022-07-19 22:09:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868295971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:09:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130197390] [2022-07-19 22:09:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:09:58,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:09:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:09:58,916 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) [2022-07-19 22:09:58,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 22:09:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:09:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-19 22:09:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:09:59,461 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 [2022-07-19 22:10:00,042 INFO L356 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-07-19 22:10:00,042 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 24 treesize of output 30 [2022-07-19 22:10:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:00,450 INFO L356 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-07-19 22:10:00,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 93 [2022-07-19 22:10:00,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:10:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:10:00,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:00,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130197390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:00,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:10:00,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-07-19 22:10:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803254869] [2022-07-19 22:10:00,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 22:10:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 22:10:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-07-19 22:10:00,742 INFO L87 Difference]: Start difference. First operand 310 states and 443 transitions. Second operand has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:01,616 INFO L93 Difference]: Finished difference Result 426 states and 608 transitions. [2022-07-19 22:10:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:10:01,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 82 [2022-07-19 22:10:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:01,619 INFO L225 Difference]: With dead ends: 426 [2022-07-19 22:10:01,619 INFO L226 Difference]: Without dead ends: 386 [2022-07-19 22:10:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=1944, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 22:10:01,620 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 232 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:01,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1602 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 731 Invalid, 0 Unknown, 1122 Unchecked, 0.5s Time] [2022-07-19 22:10:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-19 22:10:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 310. [2022-07-19 22:10:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 256 states have (on average 1.390625) internal successors, (356), 264 states have internal predecessors, (356), 32 states have call successors, (32), 15 states have call predecessors, (32), 21 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2022-07-19 22:10:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 443 transitions. [2022-07-19 22:10:01,640 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 443 transitions. Word has length 82 [2022-07-19 22:10:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:01,640 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 443 transitions. [2022-07-19 22:10:01,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 443 transitions. [2022-07-19 22:10:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:10:01,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:01,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:10:01,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:01,855 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 [2022-07-19 22:10:01,855 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1283016081, now seen corresponding path program 2 times [2022-07-19 22:10:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:01,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276961138] [2022-07-19 22:10:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:01,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:01,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 22:10:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 22:10:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:10:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:10:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276961138] [2022-07-19 22:10:02,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276961138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908269073] [2022-07-19 22:10:02,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 22:10:02,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:02,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:02,126 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) [2022-07-19 22:10:02,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 22:10:03,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 22:10:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:10:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 22:10:03,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:10:03,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:03,981 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 22:10:03,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-19 22:10:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:10:03,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908269073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:10:03,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:10:03,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-07-19 22:10:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585450199] [2022-07-19 22:10:03,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:03,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:10:03,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:10:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:10:03,993 INFO L87 Difference]: Start difference. First operand 310 states and 443 transitions. Second operand has 27 states, 24 states have (on average 5.458333333333333) internal successors, (131), 23 states have internal predecessors, (131), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 22:10:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:05,294 INFO L93 Difference]: Finished difference Result 582 states and 831 transitions. [2022-07-19 22:10:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 22:10:05,294 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 5.458333333333333) internal successors, (131), 23 states have internal predecessors, (131), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 82 [2022-07-19 22:10:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:05,296 INFO L225 Difference]: With dead ends: 582 [2022-07-19 22:10:05,296 INFO L226 Difference]: Without dead ends: 348 [2022-07-19 22:10:05,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=1901, Unknown=2, NotChecked=0, Total=2162 [2022-07-19 22:10:05,298 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 205 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:05,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 923 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1386 Invalid, 0 Unknown, 533 Unchecked, 0.8s Time] [2022-07-19 22:10:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-19 22:10:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 318. [2022-07-19 22:10:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.376425855513308) internal successors, (362), 271 states have internal predecessors, (362), 32 states have call successors, (32), 16 states have call predecessors, (32), 22 states have return successors, (54), 30 states have call predecessors, (54), 31 states have call successors, (54) [2022-07-19 22:10:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 448 transitions. [2022-07-19 22:10:05,318 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 448 transitions. Word has length 82 [2022-07-19 22:10:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:05,318 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 448 transitions. [2022-07-19 22:10:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 5.458333333333333) internal successors, (131), 23 states have internal predecessors, (131), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 22:10:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 448 transitions. [2022-07-19 22:10:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:10:05,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:05,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:05,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:05,531 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 [2022-07-19 22:10:05,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 400956781, now seen corresponding path program 1 times [2022-07-19 22:10:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086137258] [2022-07-19 22:10:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 22:10:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 22:10:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:10:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:10:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:10:05,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086137258] [2022-07-19 22:10:05,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086137258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510723712] [2022-07-19 22:10:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:05,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:05,797 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) [2022-07-19 22:10:05,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 22:10:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 22:10:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:10:06,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510723712] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:06,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2022-07-19 22:10:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069882694] [2022-07-19 22:10:06,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:06,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 22:10:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 22:10:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:10:06,416 INFO L87 Difference]: Start difference. First operand 318 states and 448 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:10:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:06,652 INFO L93 Difference]: Finished difference Result 543 states and 796 transitions. [2022-07-19 22:10:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 22:10:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-07-19 22:10:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:06,653 INFO L225 Difference]: With dead ends: 543 [2022-07-19 22:10:06,653 INFO L226 Difference]: Without dead ends: 318 [2022-07-19 22:10:06,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:10:06,655 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 17 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:06,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 548 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-07-19 22:10:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-19 22:10:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2022-07-19 22:10:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 262 states have (on average 1.3740458015267176) internal successors, (360), 270 states have internal predecessors, (360), 32 states have call successors, (32), 16 states have call predecessors, (32), 22 states have return successors, (54), 30 states have call predecessors, (54), 31 states have call successors, (54) [2022-07-19 22:10:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 446 transitions. [2022-07-19 22:10:06,697 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 446 transitions. Word has length 82 [2022-07-19 22:10:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:06,698 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 446 transitions. [2022-07-19 22:10:06,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:10:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 446 transitions. [2022-07-19 22:10:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:10:06,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:06,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:06,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:06,919 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 [2022-07-19 22:10:06,919 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash 961656559, now seen corresponding path program 1 times [2022-07-19 22:10:06,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574703303] [2022-07-19 22:10:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:06,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 22:10:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 22:10:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:10:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:10:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 22:10:07,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574703303] [2022-07-19 22:10:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574703303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981230918] [2022-07-19 22:10:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:07,193 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) [2022-07-19 22:10:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 22:10:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:07,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 22:10:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:07,747 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 13 treesize of output 9 [2022-07-19 22:10:07,750 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 13 treesize of output 9 [2022-07-19 22:10:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:10:08,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:08,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981230918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:08,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:08,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2022-07-19 22:10:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741091731] [2022-07-19 22:10:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:10:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:10:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-07-19 22:10:08,055 INFO L87 Difference]: Start difference. First operand 317 states and 446 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:10:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:08,114 INFO L93 Difference]: Finished difference Result 552 states and 794 transitions. [2022-07-19 22:10:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 22:10:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 82 [2022-07-19 22:10:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:08,116 INFO L225 Difference]: With dead ends: 552 [2022-07-19 22:10:08,117 INFO L226 Difference]: Without dead ends: 327 [2022-07-19 22:10:08,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-07-19 22:10:08,118 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 28 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:08,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 602 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2022-07-19 22:10:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-19 22:10:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 318. [2022-07-19 22:10:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.3726235741444868) internal successors, (361), 271 states have internal predecessors, (361), 32 states have call successors, (32), 16 states have call predecessors, (32), 22 states have return successors, (54), 30 states have call predecessors, (54), 31 states have call successors, (54) [2022-07-19 22:10:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 447 transitions. [2022-07-19 22:10:08,137 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 447 transitions. Word has length 82 [2022-07-19 22:10:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:08,137 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 447 transitions. [2022-07-19 22:10:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:10:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 447 transitions. [2022-07-19 22:10:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 22:10:08,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:08,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:08,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-19 22:10:08,351 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 [2022-07-19 22:10:08,351 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1640928813, now seen corresponding path program 1 times [2022-07-19 22:10:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26523919] [2022-07-19 22:10:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 22:10:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 22:10:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:10:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:10:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-19 22:10:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26523919] [2022-07-19 22:10:08,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26523919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911058833] [2022-07-19 22:10:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:08,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:08,499 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) [2022-07-19 22:10:08,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 22:10:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 22:10:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:10:09,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:09,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911058833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:09,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:09,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-19 22:10:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659955047] [2022-07-19 22:10:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:09,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:10:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:10:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:10:09,047 INFO L87 Difference]: Start difference. First operand 318 states and 447 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:10:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:09,074 INFO L93 Difference]: Finished difference Result 557 states and 798 transitions. [2022-07-19 22:10:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:10:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-07-19 22:10:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:09,091 INFO L225 Difference]: With dead ends: 557 [2022-07-19 22:10:09,091 INFO L226 Difference]: Without dead ends: 315 [2022-07-19 22:10:09,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 22:10:09,097 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 9 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 540 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 [2022-07-19 22:10:09,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 540 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:10:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-19 22:10:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2022-07-19 22:10:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 262 states have (on average 1.3625954198473282) internal successors, (357), 270 states have internal predecessors, (357), 27 states have call successors, (27), 16 states have call predecessors, (27), 22 states have return successors, (43), 25 states have call predecessors, (43), 26 states have call successors, (43) [2022-07-19 22:10:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 427 transitions. [2022-07-19 22:10:09,113 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 427 transitions. Word has length 82 [2022-07-19 22:10:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:09,113 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 427 transitions. [2022-07-19 22:10:09,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:10:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 427 transitions. [2022-07-19 22:10:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 22:10:09,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:09,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:09,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:09,335 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 [2022-07-19 22:10:09,336 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 149743056, now seen corresponding path program 1 times [2022-07-19 22:10:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431001887] [2022-07-19 22:10:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 22:10:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:10:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431001887] [2022-07-19 22:10:09,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431001887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814571340] [2022-07-19 22:10:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:09,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:09,604 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) [2022-07-19 22:10:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 22:10:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:10,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-19 22:10:10,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:10,155 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 [2022-07-19 22:10:10,649 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-19 22:10:10,649 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 2 case distinctions, treesize of input 15 treesize of output 30 [2022-07-19 22:10:11,067 INFO L356 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2022-07-19 22:10:11,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 28 [2022-07-19 22:10:11,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:10:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:10:11,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814571340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:11,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:11,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [12] total 26 [2022-07-19 22:10:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793336546] [2022-07-19 22:10:11,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:11,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:10:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:10:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=576, Unknown=1, NotChecked=0, Total=650 [2022-07-19 22:10:11,074 INFO L87 Difference]: Start difference. First operand 312 states and 427 transitions. Second operand has 16 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:10:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:11,379 INFO L93 Difference]: Finished difference Result 361 states and 488 transitions. [2022-07-19 22:10:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:10:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 83 [2022-07-19 22:10:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:11,381 INFO L225 Difference]: With dead ends: 361 [2022-07-19 22:10:11,381 INFO L226 Difference]: Without dead ends: 319 [2022-07-19 22:10:11,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=774, Unknown=1, NotChecked=0, Total=870 [2022-07-19 22:10:11,382 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 41 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:11,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 712 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 148 Invalid, 0 Unknown, 590 Unchecked, 0.2s Time] [2022-07-19 22:10:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-19 22:10:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2022-07-19 22:10:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 262 states have (on average 1.3625954198473282) internal successors, (357), 270 states have internal predecessors, (357), 27 states have call successors, (27), 16 states have call predecessors, (27), 22 states have return successors, (43), 25 states have call predecessors, (43), 26 states have call successors, (43) [2022-07-19 22:10:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 427 transitions. [2022-07-19 22:10:11,399 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 427 transitions. Word has length 83 [2022-07-19 22:10:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:11,399 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 427 transitions. [2022-07-19 22:10:11,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:10:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 427 transitions. [2022-07-19 22:10:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 22:10:11,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:11,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:11,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:11,619 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 [2022-07-19 22:10:11,619 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -853396441, now seen corresponding path program 1 times [2022-07-19 22:10:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568202208] [2022-07-19 22:10:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:11,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 22:10:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:10:11,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568202208] [2022-07-19 22:10:11,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568202208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421292111] [2022-07-19 22:10:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:11,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:11,885 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) [2022-07-19 22:10:11,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 22:10:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 22:10:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:12,426 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 [2022-07-19 22:10:12,983 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-19 22:10:12,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2022-07-19 22:10:19,296 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-07-19 22:10:19,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-07-19 22:10:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:10:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421292111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:19,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:10:19,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2022-07-19 22:10:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263518358] [2022-07-19 22:10:19,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:10:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:10:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1017, Unknown=5, NotChecked=0, Total=1122 [2022-07-19 22:10:19,641 INFO L87 Difference]: Start difference. First operand 312 states and 427 transitions. Second operand has 29 states, 27 states have (on average 4.185185185185185) internal successors, (113), 25 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:24,537 INFO L93 Difference]: Finished difference Result 389 states and 534 transitions. [2022-07-19 22:10:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 22:10:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.185185185185185) internal successors, (113), 25 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2022-07-19 22:10:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:24,540 INFO L225 Difference]: With dead ends: 389 [2022-07-19 22:10:24,540 INFO L226 Difference]: Without dead ends: 347 [2022-07-19 22:10:24,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=231, Invalid=2414, Unknown=7, NotChecked=0, Total=2652 [2022-07-19 22:10:24,542 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 148 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:24,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1210 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1225 Invalid, 0 Unknown, 575 Unchecked, 0.8s Time] [2022-07-19 22:10:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-07-19 22:10:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 310. [2022-07-19 22:10:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 260 states have (on average 1.3653846153846154) internal successors, (355), 268 states have internal predecessors, (355), 27 states have call successors, (27), 16 states have call predecessors, (27), 22 states have return successors, (43), 25 states have call predecessors, (43), 26 states have call successors, (43) [2022-07-19 22:10:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 425 transitions. [2022-07-19 22:10:24,559 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 425 transitions. Word has length 83 [2022-07-19 22:10:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:24,559 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 425 transitions. [2022-07-19 22:10:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.185185185185185) internal successors, (113), 25 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 425 transitions. [2022-07-19 22:10:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 22:10:24,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:24,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:24,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:24,771 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 [2022-07-19 22:10:24,772 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash -987409947, now seen corresponding path program 1 times [2022-07-19 22:10:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915348048] [2022-07-19 22:10:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:24,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:24,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 22:10:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:10:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915348048] [2022-07-19 22:10:25,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915348048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300008314] [2022-07-19 22:10:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:25,034 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) [2022-07-19 22:10:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 22:10:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-19 22:10:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:25,600 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 [2022-07-19 22:10:26,174 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-19 22:10:26,175 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 4 case distinctions, treesize of input 20 treesize of output 30 [2022-07-19 22:10:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:26,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:26,569 INFO L356 Elim1Store]: treesize reduction 65, result has 1.5 percent of original size [2022-07-19 22:10:26,569 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 5 case distinctions, treesize of input 36 treesize of output 23 [2022-07-19 22:10:26,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 22:10:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:10:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:26,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300008314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:26,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:10:26,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2022-07-19 22:10:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617083399] [2022-07-19 22:10:26,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:26,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 22:10:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 22:10:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2022-07-19 22:10:26,855 INFO L87 Difference]: Start difference. First operand 310 states and 425 transitions. Second operand has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:27,888 INFO L93 Difference]: Finished difference Result 365 states and 494 transitions. [2022-07-19 22:10:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 22:10:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2022-07-19 22:10:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:27,889 INFO L225 Difference]: With dead ends: 365 [2022-07-19 22:10:27,889 INFO L226 Difference]: Without dead ends: 323 [2022-07-19 22:10:27,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=2209, Unknown=2, NotChecked=0, Total=2450 [2022-07-19 22:10:27,890 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 73 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:27,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1751 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1077 Invalid, 0 Unknown, 613 Unchecked, 0.6s Time] [2022-07-19 22:10:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-19 22:10:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 310. [2022-07-19 22:10:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 260 states have (on average 1.3653846153846154) internal successors, (355), 268 states have internal predecessors, (355), 27 states have call successors, (27), 16 states have call predecessors, (27), 22 states have return successors, (43), 25 states have call predecessors, (43), 26 states have call successors, (43) [2022-07-19 22:10:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 425 transitions. [2022-07-19 22:10:27,907 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 425 transitions. Word has length 83 [2022-07-19 22:10:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:27,908 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 425 transitions. [2022-07-19 22:10:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-19 22:10:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 425 transitions. [2022-07-19 22:10:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-19 22:10:27,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:27,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:27,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:28,131 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1019997721, now seen corresponding path program 1 times [2022-07-19 22:10:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508509081] [2022-07-19 22:10:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 22:10:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 22:10:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508509081] [2022-07-19 22:10:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508509081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426982679] [2022-07-19 22:10:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:28,933 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:10:28,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 22:10:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-19 22:10:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:29,496 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 [2022-07-19 22:10:30,067 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-07-19 22:10:30,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-07-19 22:10:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:10:30,351 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:10:30,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 36 [2022-07-19 22:10:30,365 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-19 22:10:30,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 22:10:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:10:30,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:30,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426982679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:30,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:10:30,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2022-07-19 22:10:30,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977135351] [2022-07-19 22:10:30,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:30,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 22:10:30,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 22:10:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1256, Unknown=4, NotChecked=0, Total=1406 [2022-07-19 22:10:30,883 INFO L87 Difference]: Start difference. First operand 310 states and 425 transitions. Second operand has 35 states, 32 states have (on average 3.625) internal successors, (116), 30 states have internal predecessors, (116), 11 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:10:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:32,356 INFO L93 Difference]: Finished difference Result 533 states and 748 transitions. [2022-07-19 22:10:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:10:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.625) internal successors, (116), 30 states have internal predecessors, (116), 11 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 84 [2022-07-19 22:10:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:32,358 INFO L225 Difference]: With dead ends: 533 [2022-07-19 22:10:32,358 INFO L226 Difference]: Without dead ends: 400 [2022-07-19 22:10:32,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=396, Invalid=2906, Unknown=4, NotChecked=0, Total=3306 [2022-07-19 22:10:32,359 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 222 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 954 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:32,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1439 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 896 Invalid, 0 Unknown, 954 Unchecked, 0.7s Time] [2022-07-19 22:10:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-19 22:10:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 391. [2022-07-19 22:10:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 339 states have (on average 1.351032448377581) internal successors, (458), 346 states have internal predecessors, (458), 28 states have call successors, (28), 18 states have call predecessors, (28), 23 states have return successors, (45), 26 states have call predecessors, (45), 27 states have call successors, (45) [2022-07-19 22:10:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 531 transitions. [2022-07-19 22:10:32,380 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 531 transitions. Word has length 84 [2022-07-19 22:10:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:32,380 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 531 transitions. [2022-07-19 22:10:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.625) internal successors, (116), 30 states have internal predecessors, (116), 11 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-19 22:10:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 531 transitions. [2022-07-19 22:10:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 22:10:32,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:32,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:32,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 22:10:32,607 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1753520211, now seen corresponding path program 1 times [2022-07-19 22:10:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538726558] [2022-07-19 22:10:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:32,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:10:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 22:10:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:10:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538726558] [2022-07-19 22:10:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538726558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191628696] [2022-07-19 22:10:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:32,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:32,866 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:10:32,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 22:10:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 22:10:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:10:33,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:10:33,993 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 22:10:33,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-19 22:10:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:10:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191628696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:10:34,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:10:34,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-07-19 22:10:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310910425] [2022-07-19 22:10:34,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:10:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:10:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:10:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:10:34,004 INFO L87 Difference]: Start difference. First operand 391 states and 531 transitions. Second operand has 27 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 22:10:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:35,619 INFO L93 Difference]: Finished difference Result 628 states and 866 transitions. [2022-07-19 22:10:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 22:10:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 86 [2022-07-19 22:10:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:35,621 INFO L225 Difference]: With dead ends: 628 [2022-07-19 22:10:35,621 INFO L226 Difference]: Without dead ends: 391 [2022-07-19 22:10:35,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1796, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 22:10:35,622 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 227 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:35,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1057 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2038 Invalid, 0 Unknown, 286 Unchecked, 1.1s Time] [2022-07-19 22:10:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-19 22:10:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 371. [2022-07-19 22:10:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 323 states have (on average 1.3622291021671826) internal successors, (440), 329 states have internal predecessors, (440), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (39), 24 states have call predecessors, (39), 25 states have call successors, (39) [2022-07-19 22:10:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 505 transitions. [2022-07-19 22:10:35,640 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 505 transitions. Word has length 86 [2022-07-19 22:10:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:35,641 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 505 transitions. [2022-07-19 22:10:35,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 10 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 22:10:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 505 transitions. [2022-07-19 22:10:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 22:10:35,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:35,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:35,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:35,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:35,843 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 888970621, now seen corresponding path program 1 times [2022-07-19 22:10:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624509776] [2022-07-19 22:10:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 22:10:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:10:36,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624509776] [2022-07-19 22:10:36,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624509776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:36,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:10:36,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 22:10:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79991399] [2022-07-19 22:10:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 22:10:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 22:10:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:10:36,385 INFO L87 Difference]: Start difference. First operand 371 states and 505 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:10:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:37,748 INFO L93 Difference]: Finished difference Result 427 states and 573 transitions. [2022-07-19 22:10:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:10:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 89 [2022-07-19 22:10:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:37,750 INFO L225 Difference]: With dead ends: 427 [2022-07-19 22:10:37,750 INFO L226 Difference]: Without dead ends: 392 [2022-07-19 22:10:37,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-19 22:10:37,751 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 153 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:37,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 566 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 22:10:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-19 22:10:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 371. [2022-07-19 22:10:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 323 states have (on average 1.3622291021671826) internal successors, (440), 329 states have internal predecessors, (440), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (39), 24 states have call predecessors, (39), 25 states have call successors, (39) [2022-07-19 22:10:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 505 transitions. [2022-07-19 22:10:37,769 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 505 transitions. Word has length 89 [2022-07-19 22:10:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:37,770 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 505 transitions. [2022-07-19 22:10:37,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:10:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 505 transitions. [2022-07-19 22:10:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 22:10:37,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:37,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-19 22:10:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 22:10:37,771 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1114977175, now seen corresponding path program 1 times [2022-07-19 22:10:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990013653] [2022-07-19 22:10:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:10:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 22:10:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:10:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:10:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:10:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:10:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 22:10:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-19 22:10:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 22:10:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:37,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990013653] [2022-07-19 22:10:37,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990013653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:37,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:10:37,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 22:10:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357179840] [2022-07-19 22:10:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:37,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:10:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:10:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:10:37,966 INFO L87 Difference]: Start difference. First operand 371 states and 505 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-19 22:10:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:38,298 INFO L93 Difference]: Finished difference Result 378 states and 511 transitions. [2022-07-19 22:10:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:10:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 93 [2022-07-19 22:10:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:38,299 INFO L225 Difference]: With dead ends: 378 [2022-07-19 22:10:38,299 INFO L226 Difference]: Without dead ends: 371 [2022-07-19 22:10:38,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:10:38,300 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 42 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:38,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1118 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:10:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-19 22:10:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-07-19 22:10:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 323 states have (on average 1.3622291021671826) internal successors, (440), 329 states have internal predecessors, (440), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38) [2022-07-19 22:10:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 504 transitions. [2022-07-19 22:10:38,323 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 504 transitions. Word has length 93 [2022-07-19 22:10:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:38,323 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 504 transitions. [2022-07-19 22:10:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-19 22:10:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 504 transitions. [2022-07-19 22:10:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 22:10:38,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:38,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-19 22:10:38,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 22:10:38,325 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1934298862, now seen corresponding path program 1 times [2022-07-19 22:10:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15935616] [2022-07-19 22:10:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:38,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:10:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:10:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:10:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 22:10:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:10:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:10:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 22:10:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 22:10:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 22:10:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15935616] [2022-07-19 22:10:39,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15935616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:39,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:10:39,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-19 22:10:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405469282] [2022-07-19 22:10:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 22:10:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 22:10:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:10:39,036 INFO L87 Difference]: Start difference. First operand 371 states and 504 transitions. Second operand has 22 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 22:10:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:40,494 INFO L93 Difference]: Finished difference Result 427 states and 571 transitions. [2022-07-19 22:10:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 22:10:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 93 [2022-07-19 22:10:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:40,496 INFO L225 Difference]: With dead ends: 427 [2022-07-19 22:10:40,496 INFO L226 Difference]: Without dead ends: 392 [2022-07-19 22:10:40,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-07-19 22:10:40,496 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 200 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:40,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 540 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 22:10:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-19 22:10:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 373. [2022-07-19 22:10:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 324 states have (on average 1.3611111111111112) internal successors, (441), 331 states have internal predecessors, (441), 26 states have call successors, (26), 17 states have call predecessors, (26), 22 states have return successors, (41), 24 states have call predecessors, (41), 25 states have call successors, (41) [2022-07-19 22:10:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 508 transitions. [2022-07-19 22:10:40,517 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 508 transitions. Word has length 93 [2022-07-19 22:10:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:40,517 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 508 transitions. [2022-07-19 22:10:40,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 22:10:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 508 transitions. [2022-07-19 22:10:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 22:10:40,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:40,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:40,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 22:10:40,519 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1014177130, now seen corresponding path program 1 times [2022-07-19 22:10:40,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:40,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858192554] [2022-07-19 22:10:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:10:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:10:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:10:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:10:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:10:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:10:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:10:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 22:10:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 22:10:40,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:40,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858192554] [2022-07-19 22:10:40,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858192554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:40,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7600239] [2022-07-19 22:10:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:40,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:40,834 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:10:40,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 22:10:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 22:10:41,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:41,491 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 [2022-07-19 22:10:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:10:41,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:41,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7600239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:41,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:41,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2022-07-19 22:10:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65242193] [2022-07-19 22:10:41,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 22:10:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 22:10:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:10:41,857 INFO L87 Difference]: Start difference. First operand 373 states and 508 transitions. Second operand has 13 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:10:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:42,002 INFO L93 Difference]: Finished difference Result 628 states and 864 transitions. [2022-07-19 22:10:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 22:10:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 93 [2022-07-19 22:10:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:42,004 INFO L225 Difference]: With dead ends: 628 [2022-07-19 22:10:42,004 INFO L226 Difference]: Without dead ends: 411 [2022-07-19 22:10:42,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-07-19 22:10:42,004 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 29 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:42,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1309 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-07-19 22:10:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-07-19 22:10:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 396. [2022-07-19 22:10:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 344 states have (on average 1.3459302325581395) internal successors, (463), 352 states have internal predecessors, (463), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (39), 24 states have call predecessors, (39), 25 states have call successors, (39) [2022-07-19 22:10:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 528 transitions. [2022-07-19 22:10:42,024 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 528 transitions. Word has length 93 [2022-07-19 22:10:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:42,024 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 528 transitions. [2022-07-19 22:10:42,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:10:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 528 transitions. [2022-07-19 22:10:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 22:10:42,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:42,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:10:42,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-19 22:10:42,239 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -766030636, now seen corresponding path program 1 times [2022-07-19 22:10:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108053632] [2022-07-19 22:10:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:10:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:10:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:10:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:10:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:10:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:10:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:10:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 22:10:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 22:10:42,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108053632] [2022-07-19 22:10:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108053632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364542987] [2022-07-19 22:10:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:42,515 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:10:42,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 22:10:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 22:10:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:10:43,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:43,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364542987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:43,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:43,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2022-07-19 22:10:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096916439] [2022-07-19 22:10:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:10:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:10:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:10:43,176 INFO L87 Difference]: Start difference. First operand 396 states and 528 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 22:10:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:43,324 INFO L93 Difference]: Finished difference Result 601 states and 828 transitions. [2022-07-19 22:10:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 22:10:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2022-07-19 22:10:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:43,325 INFO L225 Difference]: With dead ends: 601 [2022-07-19 22:10:43,325 INFO L226 Difference]: Without dead ends: 387 [2022-07-19 22:10:43,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:10:43,326 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:43,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 424 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-07-19 22:10:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-19 22:10:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-07-19 22:10:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 336 states have (on average 1.3482142857142858) internal successors, (453), 343 states have internal predecessors, (453), 26 states have call successors, (26), 19 states have call predecessors, (26), 24 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38) [2022-07-19 22:10:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 517 transitions. [2022-07-19 22:10:43,345 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 517 transitions. Word has length 93 [2022-07-19 22:10:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:43,345 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 517 transitions. [2022-07-19 22:10:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 22:10:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 517 transitions. [2022-07-19 22:10:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 22:10:43,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:43,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-19 22:10:43,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 22:10:43,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 22:10:43,547 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:10:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:10:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -971559159, now seen corresponding path program 1 times [2022-07-19 22:10:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:10:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211845401] [2022-07-19 22:10:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:10:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:10:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:10:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:10:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:10:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:10:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 22:10:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:10:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:10:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 22:10:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:10:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 22:10:43,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:10:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211845401] [2022-07-19 22:10:43,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211845401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:10:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684180652] [2022-07-19 22:10:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:10:43,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:10:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:10:43,848 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:10:43,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 22:10:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:10:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-19 22:10:44,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:10:44,534 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 [2022-07-19 22:10:44,875 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:10:44,875 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 22 treesize of output 34 [2022-07-19 22:10:59,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-19 22:10:59,108 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:10:59,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2022-07-19 22:10:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 22:10:59,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:10:59,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684180652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:10:59,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:10:59,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2022-07-19 22:10:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881810533] [2022-07-19 22:10:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:10:59,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 22:10:59,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:10:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 22:10:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1024, Unknown=6, NotChecked=0, Total=1122 [2022-07-19 22:10:59,391 INFO L87 Difference]: Start difference. First operand 387 states and 517 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-19 22:10:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:10:59,830 INFO L93 Difference]: Finished difference Result 456 states and 600 transitions. [2022-07-19 22:10:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 22:10:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 94 [2022-07-19 22:10:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:10:59,831 INFO L225 Difference]: With dead ends: 456 [2022-07-19 22:10:59,831 INFO L226 Difference]: Without dead ends: 423 [2022-07-19 22:10:59,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=141, Invalid=1575, Unknown=6, NotChecked=0, Total=1722 [2022-07-19 22:10:59,832 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 69 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:10:59,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1583 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 380 Invalid, 0 Unknown, 618 Unchecked, 0.3s Time] [2022-07-19 22:10:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-19 22:10:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 408. [2022-07-19 22:10:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 353 states have (on average 1.3371104815864023) internal successors, (472), 360 states have internal predecessors, (472), 28 states have call successors, (28), 21 states have call predecessors, (28), 26 states have return successors, (44), 26 states have call predecessors, (44), 27 states have call successors, (44) [2022-07-19 22:10:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 544 transitions. [2022-07-19 22:10:59,852 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 544 transitions. Word has length 94 [2022-07-19 22:10:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:10:59,853 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 544 transitions. [2022-07-19 22:10:59,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-19 22:10:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 544 transitions. [2022-07-19 22:10:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 22:10:59,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:10:59,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-19 22:10:59,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-19 22:11:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-19 22:11:00,068 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:11:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:11:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash 619367424, now seen corresponding path program 1 times [2022-07-19 22:11:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:11:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443197311] [2022-07-19 22:11:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:11:00,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:11:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:11:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:11:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:11:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:11:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:11:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 22:11:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:11:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:11:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 22:11:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:00,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 22:11:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 22:11:01,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:11:01,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443197311] [2022-07-19 22:11:01,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443197311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:11:01,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12726086] [2022-07-19 22:11:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:11:01,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:11:01,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:11:01,048 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:11:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 22:11:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-19 22:11:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:11:01,638 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 [2022-07-19 22:11:01,770 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 22:11:01,770 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 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-19 22:11:01,840 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 [2022-07-19 22:11:02,410 INFO L356 Elim1Store]: treesize reduction 122, result has 20.8 percent of original size [2022-07-19 22:11:02,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 50 [2022-07-19 22:11:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:11:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:11:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:11:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:11:02,795 INFO L356 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-07-19 22:11:02,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 136 [2022-07-19 22:11:02,820 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-07-19 22:11:02,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 27 [2022-07-19 22:11:02,830 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 8 treesize of output 7 [2022-07-19 22:11:02,845 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 17 treesize of output 15 [2022-07-19 22:11:02,862 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 12 treesize of output 11 [2022-07-19 22:11:02,884 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2022-07-19 22:11:03,040 INFO L356 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-07-19 22:11:03,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 117 [2022-07-19 22:11:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 22:11:13,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:11:13,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12726086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:11:13,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:11:13,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 43 [2022-07-19 22:11:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922663062] [2022-07-19 22:11:13,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:11:13,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 22:11:13,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:11:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 22:11:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2156, Unknown=17, NotChecked=0, Total=2352 [2022-07-19 22:11:13,800 INFO L87 Difference]: Start difference. First operand 408 states and 544 transitions. Second operand has 43 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 36 states have internal predecessors, (118), 15 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (19), 12 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-19 22:11:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:11:22,490 INFO L93 Difference]: Finished difference Result 576 states and 776 transitions. [2022-07-19 22:11:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 22:11:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 36 states have internal predecessors, (118), 15 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (19), 12 states have call predecessors, (19), 14 states have call successors, (19) Word has length 95 [2022-07-19 22:11:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:11:22,492 INFO L225 Difference]: With dead ends: 576 [2022-07-19 22:11:22,492 INFO L226 Difference]: Without dead ends: 543 [2022-07-19 22:11:22,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=576, Invalid=6204, Unknown=26, NotChecked=0, Total=6806 [2022-07-19 22:11:22,493 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 215 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 3872 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1062 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:11:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 3872 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1694 Invalid, 0 Unknown, 1062 Unchecked, 1.1s Time] [2022-07-19 22:11:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-19 22:11:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 470. [2022-07-19 22:11:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 412 states have (on average 1.3616504854368932) internal successors, (561), 420 states have internal predecessors, (561), 29 states have call successors, (29), 22 states have call predecessors, (29), 28 states have return successors, (51), 27 states have call predecessors, (51), 28 states have call successors, (51) [2022-07-19 22:11:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 641 transitions. [2022-07-19 22:11:22,516 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 641 transitions. Word has length 95 [2022-07-19 22:11:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:11:22,516 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 641 transitions. [2022-07-19 22:11:22,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 36 states have internal predecessors, (118), 15 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (19), 12 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-19 22:11:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 641 transitions. [2022-07-19 22:11:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 22:11:22,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:11:22,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:11:22,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 22:11:22,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:11:22,735 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:11:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:11:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 599464349, now seen corresponding path program 2 times [2022-07-19 22:11:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:11:22,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007896304] [2022-07-19 22:11:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:11:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:11:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:11:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:11:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:11:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:11:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:11:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:11:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:11:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:11:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 22:11:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 22:11:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 22:11:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:11:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007896304] [2022-07-19 22:11:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007896304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:11:23,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:11:23,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-07-19 22:11:23,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988296812] [2022-07-19 22:11:23,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:11:23,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 22:11:23,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:11:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 22:11:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-07-19 22:11:23,757 INFO L87 Difference]: Start difference. First operand 470 states and 641 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-19 22:11:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:11:25,617 INFO L93 Difference]: Finished difference Result 525 states and 705 transitions. [2022-07-19 22:11:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 22:11:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 95 [2022-07-19 22:11:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:11:25,619 INFO L225 Difference]: With dead ends: 525 [2022-07-19 22:11:25,619 INFO L226 Difference]: Without dead ends: 492 [2022-07-19 22:11:25,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 22:11:25,620 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 215 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:11:25,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1133 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2570 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 22:11:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-19 22:11:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 476. [2022-07-19 22:11:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 416 states have (on average 1.3581730769230769) internal successors, (565), 425 states have internal predecessors, (565), 30 states have call successors, (30), 22 states have call predecessors, (30), 29 states have return successors, (54), 28 states have call predecessors, (54), 29 states have call successors, (54) [2022-07-19 22:11:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 649 transitions. [2022-07-19 22:11:25,643 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 649 transitions. Word has length 95 [2022-07-19 22:11:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:11:25,644 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 649 transitions. [2022-07-19 22:11:25,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-19 22:11:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 649 transitions. [2022-07-19 22:11:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:11:25,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:11:25,645 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-19 22:11:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 22:11:25,645 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:11:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:11:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1838370896, now seen corresponding path program 1 times [2022-07-19 22:11:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:11:25,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284590345] [2022-07-19 22:11:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:11:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:11:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:11:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 22:11:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 22:11:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:11:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 22:11:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 22:11:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:11:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:11:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 22:11:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:11:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 22:11:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:11:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284590345] [2022-07-19 22:11:25,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284590345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:11:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261340944] [2022-07-19 22:11:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:11:25,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:11:25,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:11:25,969 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:11:25,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 22:11:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:11:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 22:11:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:11:32,861 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 22:11:40,935 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 22:11:49,016 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)