./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:29:27,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:29:27,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:29:27,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:29:27,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:29:27,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:29:27,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:29:27,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:29:27,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:29:27,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:29:27,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:29:27,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:29:27,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:29:27,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:29:27,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:29:27,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:29:27,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:29:27,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:29:27,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:29:27,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:29:27,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:29:27,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:29:27,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:29:27,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:29:27,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:29:27,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:29:27,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:29:27,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:29:27,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:29:27,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:29:27,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:29:27,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:29:27,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:29:27,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:29:27,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:29:27,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:29:27,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:29:27,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:29:27,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:29:27,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:29:27,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:29:27,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:29:27,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:29:27,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:29:27,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:29:27,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:29:27,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:29:27,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:29:27,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:29:27,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:29:27,561 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:29:27,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:29:27,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:29:27,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:29:27,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:29:27,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:29:27,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:29:27,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:29:27,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:29:27,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:29:27,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:29:27,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:29:27,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-16 21:29:27,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:29:27,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:29:27,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:29:27,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:29:27,804 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:29:27,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-16 21:29:27,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0b6fe55/4816114f059545daa2ad20fe9a793e8d/FLAG6decb0819 [2021-11-16 21:29:28,320 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:29:28,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-16 21:29:28,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0b6fe55/4816114f059545daa2ad20fe9a793e8d/FLAG6decb0819 [2021-11-16 21:29:28,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0b6fe55/4816114f059545daa2ad20fe9a793e8d [2021-11-16 21:29:28,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:29:28,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:29:28,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:29:28,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:29:28,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:29:28,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:29:28" (1/1) ... [2021-11-16 21:29:28,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a0109c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:28, skipping insertion in model container [2021-11-16 21:29:28,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:29:28" (1/1) ... [2021-11-16 21:29:28,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:29:28,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:29:28,628 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_linked_list_rend_harness.i[4494,4507] [2021-11-16 21:29:28,631 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_linked_list_rend_harness.i[4554,4567] [2021-11-16 21:29:28,642 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:29:28,645 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:29:29,007 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,014 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,015 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,015 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,017 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,023 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,025 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,030 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,031 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,033 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,034 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:29:29,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:29:29,215 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:29:29,216 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:29:29,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:29:29,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:29:29,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:29:29,218 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:29:29,218 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:29:29,219 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:29:29,288 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:29:29,301 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:29:29,323 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:29:29,331 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_linked_list_rend_harness.i[4494,4507] [2021-11-16 21:29:29,337 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_linked_list_rend_harness.i[4554,4567] [2021-11-16 21:29:29,339 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:29:29,340 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:29:29,381 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,389 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,390 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,390 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,391 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,396 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,396 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,397 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,397 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,398 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,398 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,399 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,400 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:29:29,436 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:29:29,447 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:29:29,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:29:29,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:29:29,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:29:29,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:29:29,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:29:29,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:29:29,451 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:29:29,451 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:29:29,465 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:29:29,473 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:29:29,628 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:29:29,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29 WrapperNode [2021-11-16 21:29:29,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:29:29,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:29:29,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:29:29,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:29:29,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,779 INFO L137 Inliner]: procedures = 681, calls = 1042, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2021-11-16 21:29:29,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:29:29,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:29:29,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:29:29,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:29:29,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:29:29,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:29:29,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:29:29,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:29:29,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (1/1) ... [2021-11-16 21:29:29,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:29:29,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:29,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 21:29:29,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 21:29:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:29:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:29:29,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:29:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:29:29,954 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:29:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:29:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-16 21:29:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-16 21:29:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:29:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:29:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:29:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:29:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:29:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:29:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:29:29,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:29:29,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:29:29,956 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:29:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:29:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:29:30,136 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:29:30,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:29:30,289 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:29:30,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:29:30,297 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-16 21:29:30,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:29:30 BoogieIcfgContainer [2021-11-16 21:29:30,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:29:30,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:29:30,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:29:30,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:29:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:29:28" (1/3) ... [2021-11-16 21:29:30,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b553acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:29:30, skipping insertion in model container [2021-11-16 21:29:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:29:29" (2/3) ... [2021-11-16 21:29:30,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b553acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:29:30, skipping insertion in model container [2021-11-16 21:29:30,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:29:30" (3/3) ... [2021-11-16 21:29:30,307 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-16 21:29:30,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:29:30,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:29:30,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:29:30,359 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 21:29:30,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:29:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-16 21:29:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 21:29:30,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:30,381 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:30,381 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-11-16 21:29:30,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:30,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45357927] [2021-11-16 21:29:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:30,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:29:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:29:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:29:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:29:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-16 21:29:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:30,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45357927] [2021-11-16 21:29:30,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45357927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:30,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:29:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-16 21:29:30,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369522118] [2021-11-16 21:29:30,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:30,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 21:29:30,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 21:29:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 21:29:30,734 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:30,751 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-11-16 21:29:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 21:29:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-16 21:29:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:30,757 INFO L225 Difference]: With dead ends: 128 [2021-11-16 21:29:30,757 INFO L226 Difference]: Without dead ends: 63 [2021-11-16 21:29:30,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 21:29:30,761 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:30,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-16 21:29:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-16 21:29:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-16 21:29:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-11-16 21:29:30,788 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-11-16 21:29:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:30,789 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-11-16 21:29:30,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-11-16 21:29:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 21:29:30,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:30,792 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:30,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 21:29:30,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-11-16 21:29:30,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:30,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707365131] [2021-11-16 21:29:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:30,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:29:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:29:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:29:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:29:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:29:30,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:30,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707365131] [2021-11-16 21:29:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707365131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:30,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460557921] [2021-11-16 21:29:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:30,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:30,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:30,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 21:29:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-16 21:29:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:31,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,164 INFO L388 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 18 treesize of output 19 [2021-11-16 21:29:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,177 INFO L388 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 18 treesize of output 19 [2021-11-16 21:29:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:29:31,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-16 21:29:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:31,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-16 21:29:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:31,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:31,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460557921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:31,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:31,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-11-16 21:29:31,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326516311] [2021-11-16 21:29:31,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:31,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:29:31,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:29:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:29:31,862 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 21:29:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:31,970 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-11-16 21:29:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:29:31,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-16 21:29:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:31,972 INFO L225 Difference]: With dead ends: 144 [2021-11-16 21:29:31,972 INFO L226 Difference]: Without dead ends: 93 [2021-11-16 21:29:31,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:29:31,974 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:31,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-11-16 21:29:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-16 21:29:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-11-16 21:29:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-16 21:29:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-11-16 21:29:31,982 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-11-16 21:29:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:31,983 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-11-16 21:29:31,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 21:29:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-11-16 21:29:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 21:29:31,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:31,984 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:32,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:32,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:32,205 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-11-16 21:29:32,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:32,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862935239] [2021-11-16 21:29:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:32,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:29:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:29:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:29:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:29:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:29:32,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:32,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862935239] [2021-11-16 21:29:32,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862935239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:32,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233946753] [2021-11-16 21:29:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:32,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:32,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 21:29:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-16 21:29:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:32,566 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-16 21:29:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-16 21:29:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:32,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233946753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:32,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:32,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-11-16 21:29:32,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620588633] [2021-11-16 21:29:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:32,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:29:32,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:29:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:29:32,934 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 21:29:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:32,987 INFO L93 Difference]: Finished difference Result 173 states and 238 transitions. [2021-11-16 21:29:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:29:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-16 21:29:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:32,988 INFO L225 Difference]: With dead ends: 173 [2021-11-16 21:29:32,989 INFO L226 Difference]: Without dead ends: 118 [2021-11-16 21:29:32,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:29:32,990 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:32,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 658 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 132 Unchecked, 0.0s Time] [2021-11-16 21:29:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-16 21:29:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-11-16 21:29:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 79 states have internal predecessors, (105), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-16 21:29:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2021-11-16 21:29:32,998 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 68 [2021-11-16 21:29:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:32,998 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2021-11-16 21:29:32,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 21:29:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2021-11-16 21:29:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 21:29:32,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:32,999 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:33,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:33,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-16 21:29:33,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:33,231 INFO L85 PathProgramCache]: Analyzing trace with hash 779681482, now seen corresponding path program 1 times [2021-11-16 21:29:33,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:33,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406665645] [2021-11-16 21:29:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:33,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:29:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:29:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:29:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:29:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:29:33,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:33,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406665645] [2021-11-16 21:29:33,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406665645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:33,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529021372] [2021-11-16 21:29:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:33,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:33,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 21:29:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-16 21:29:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:33,506 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:29:33,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-16 21:29:33,516 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:29:33,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-16 21:29:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 21:29:40,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529021372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:41,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 12] total 30 [2021-11-16 21:29:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768687886] [2021-11-16 21:29:41,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:41,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 21:29:41,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 21:29:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:29:41,177 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-16 21:29:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:42,589 INFO L93 Difference]: Finished difference Result 346 states and 525 transitions. [2021-11-16 21:29:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-16 21:29:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 68 [2021-11-16 21:29:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:42,593 INFO L225 Difference]: With dead ends: 346 [2021-11-16 21:29:42,593 INFO L226 Difference]: Without dead ends: 286 [2021-11-16 21:29:42,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=343, Invalid=2627, Unknown=0, NotChecked=0, Total=2970 [2021-11-16 21:29:42,595 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2501 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:42,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 2501 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 627 Invalid, 0 Unknown, 674 Unchecked, 0.4s Time] [2021-11-16 21:29:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-16 21:29:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 249. [2021-11-16 21:29:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 206 states have (on average 1.4223300970873787) internal successors, (293), 216 states have internal predecessors, (293), 23 states have call successors, (23), 11 states have call predecessors, (23), 19 states have return successors, (57), 21 states have call predecessors, (57), 22 states have call successors, (57) [2021-11-16 21:29:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 373 transitions. [2021-11-16 21:29:42,620 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 373 transitions. Word has length 68 [2021-11-16 21:29:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:42,620 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 373 transitions. [2021-11-16 21:29:42,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-16 21:29:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 373 transitions. [2021-11-16 21:29:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-16 21:29:42,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:42,623 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:42,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-16 21:29:42,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:42,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-11-16 21:29:42,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:42,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8451327] [2021-11-16 21:29:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:42,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:29:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:29:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:29:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:29:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 21:29:42,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:42,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8451327] [2021-11-16 21:29:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8451327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:42,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650370076] [2021-11-16 21:29:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:42,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:42,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 21:29:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 21:29:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:43,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650370076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:43,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:43,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-16 21:29:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098424980] [2021-11-16 21:29:43,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:29:43,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:29:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:29:43,159 INFO L87 Difference]: Start difference. First operand 249 states and 373 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:43,268 INFO L93 Difference]: Finished difference Result 448 states and 682 transitions. [2021-11-16 21:29:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:29:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-16 21:29:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:43,271 INFO L225 Difference]: With dead ends: 448 [2021-11-16 21:29:43,271 INFO L226 Difference]: Without dead ends: 278 [2021-11-16 21:29:43,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:29:43,272 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:43,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:29:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-16 21:29:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 259. [2021-11-16 21:29:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 213 states have (on average 1.3990610328638498) internal successors, (298), 226 states have internal predecessors, (298), 23 states have call successors, (23), 11 states have call predecessors, (23), 22 states have return successors, (67), 21 states have call predecessors, (67), 22 states have call successors, (67) [2021-11-16 21:29:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 388 transitions. [2021-11-16 21:29:43,290 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 388 transitions. Word has length 70 [2021-11-16 21:29:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:43,290 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 388 transitions. [2021-11-16 21:29:43,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 388 transitions. [2021-11-16 21:29:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 21:29:43,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:43,292 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:43,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:43,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:43,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-11-16 21:29:43,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:43,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038938424] [2021-11-16 21:29:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:43,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:29:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:29:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:29:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 21:29:43,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:43,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038938424] [2021-11-16 21:29:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038938424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:43,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42884648] [2021-11-16 21:29:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:43,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:43,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:43,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:43,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 21:29:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:29:43,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:43,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:43,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42884648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:43,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:43,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-11-16 21:29:43,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552946627] [2021-11-16 21:29:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:29:43,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:29:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:29:43,843 INFO L87 Difference]: Start difference. First operand 259 states and 388 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:44,004 INFO L93 Difference]: Finished difference Result 520 states and 798 transitions. [2021-11-16 21:29:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:29:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-16 21:29:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:44,007 INFO L225 Difference]: With dead ends: 520 [2021-11-16 21:29:44,007 INFO L226 Difference]: Without dead ends: 338 [2021-11-16 21:29:44,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:29:44,008 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:29:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-16 21:29:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 267. [2021-11-16 21:29:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 221 states have (on average 1.3936651583710407) internal successors, (308), 234 states have internal predecessors, (308), 23 states have call successors, (23), 11 states have call predecessors, (23), 22 states have return successors, (67), 21 states have call predecessors, (67), 22 states have call successors, (67) [2021-11-16 21:29:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 398 transitions. [2021-11-16 21:29:44,023 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 398 transitions. Word has length 72 [2021-11-16 21:29:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:44,023 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 398 transitions. [2021-11-16 21:29:44,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 398 transitions. [2021-11-16 21:29:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:29:44,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:44,025 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:44,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:44,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:44,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-11-16 21:29:44,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:44,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431842628] [2021-11-16 21:29:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:44,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 21:29:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 21:29:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 21:29:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:29:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 21:29:44,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:44,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431842628] [2021-11-16 21:29:44,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431842628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:44,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948649280] [2021-11-16 21:29:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:44,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:44,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:44,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 21:29:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-16 21:29:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-16 21:29:44,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948649280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:44,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:44,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-16 21:29:44,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173434239] [2021-11-16 21:29:44,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 21:29:44,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 21:29:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:29:44,541 INFO L87 Difference]: Start difference. First operand 267 states and 398 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:44,580 INFO L93 Difference]: Finished difference Result 430 states and 669 transitions. [2021-11-16 21:29:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 21:29:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-16 21:29:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:44,581 INFO L225 Difference]: With dead ends: 430 [2021-11-16 21:29:44,582 INFO L226 Difference]: Without dead ends: 234 [2021-11-16 21:29:44,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:29:44,583 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:44,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-16 21:29:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2021-11-16 21:29:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 151 states have (on average 1.3708609271523178) internal successors, (207), 159 states have internal predecessors, (207), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (44), 17 states have call predecessors, (44), 18 states have call successors, (44) [2021-11-16 21:29:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 270 transitions. [2021-11-16 21:29:44,595 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 270 transitions. Word has length 73 [2021-11-16 21:29:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:44,596 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 270 transitions. [2021-11-16 21:29:44,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:29:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 270 transitions. [2021-11-16 21:29:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 21:29:44,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:44,598 INFO L514 BasicCegarLoop]: 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] [2021-11-16 21:29:44,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:44,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:44,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2021-11-16 21:29:44,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:44,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163254037] [2021-11-16 21:29:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:44,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:29:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 21:29:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:29:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:29:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:29:44,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:44,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163254037] [2021-11-16 21:29:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163254037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:44,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293340349] [2021-11-16 21:29:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:44,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:44,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:44,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:44,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 21:29:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 21:29:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,110 INFO L388 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 18 treesize of output 19 [2021-11-16 21:29:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-16 21:29:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:29:45,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-16 21:29:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 21:29:46,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:47,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 202 [2021-11-16 21:29:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 860 treesize of output 848 [2021-11-16 21:29:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:29:47,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293340349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:47,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:47,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 13] total 31 [2021-11-16 21:29:47,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676753236] [2021-11-16 21:29:47,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:47,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:29:47,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:29:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-11-16 21:29:47,731 INFO L87 Difference]: Start difference. First operand 185 states and 270 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-16 21:29:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:48,474 INFO L93 Difference]: Finished difference Result 437 states and 804 transitions. [2021-11-16 21:29:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 21:29:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) Word has length 81 [2021-11-16 21:29:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:48,477 INFO L225 Difference]: With dead ends: 437 [2021-11-16 21:29:48,477 INFO L226 Difference]: Without dead ends: 301 [2021-11-16 21:29:48,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2021-11-16 21:29:48,478 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 93 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:48,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1619 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 565 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2021-11-16 21:29:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-16 21:29:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 206. [2021-11-16 21:29:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 177 states have internal predecessors, (226), 21 states have call successors, (21), 9 states have call predecessors, (21), 15 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-16 21:29:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 293 transitions. [2021-11-16 21:29:48,503 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 293 transitions. Word has length 81 [2021-11-16 21:29:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:48,504 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 293 transitions. [2021-11-16 21:29:48,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-16 21:29:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 293 transitions. [2021-11-16 21:29:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 21:29:48,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:48,506 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-16 21:29:48,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:48,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:48,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2021-11-16 21:29:48,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:48,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806900286] [2021-11-16 21:29:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:48,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:29:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:29:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:29:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:29:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 21:29:48,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:48,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806900286] [2021-11-16 21:29:48,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806900286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:48,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475548336] [2021-11-16 21:29:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:48,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:48,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 21:29:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 21:29:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:49,018 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:29:49,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:29:49,033 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:29:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:29:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-16 21:29:52,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 21:29:53,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475548336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:53,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:53,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 8] total 24 [2021-11-16 21:29:53,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884773951] [2021-11-16 21:29:53,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:53,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 21:29:53,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:53,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 21:29:53,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-16 21:29:53,070 INFO L87 Difference]: Start difference. First operand 206 states and 293 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-16 21:29:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:53,288 INFO L93 Difference]: Finished difference Result 474 states and 715 transitions. [2021-11-16 21:29:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 21:29:53,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 83 [2021-11-16 21:29:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:53,290 INFO L225 Difference]: With dead ends: 474 [2021-11-16 21:29:53,290 INFO L226 Difference]: Without dead ends: 343 [2021-11-16 21:29:53,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:29:53,291 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 102 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:53,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 953 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-11-16 21:29:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-16 21:29:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 321. [2021-11-16 21:29:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 266 states have (on average 1.3233082706766917) internal successors, (352), 284 states have internal predecessors, (352), 31 states have call successors, (31), 11 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-16 21:29:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 471 transitions. [2021-11-16 21:29:53,304 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 471 transitions. Word has length 83 [2021-11-16 21:29:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:53,304 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 471 transitions. [2021-11-16 21:29:53,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-16 21:29:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 471 transitions. [2021-11-16 21:29:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 21:29:53,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:53,306 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-16 21:29:53,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:53,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-16 21:29:53,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1609738742, now seen corresponding path program 1 times [2021-11-16 21:29:53,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:53,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742403633] [2021-11-16 21:29:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:53,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:29:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:29:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:29:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:29:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-16 21:29:53,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:53,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742403633] [2021-11-16 21:29:53,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742403633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:53,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391457726] [2021-11-16 21:29:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:53,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:53,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:29:53,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 21:29:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:29:53,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 21:29:53,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:53,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391457726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:53,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 21:29:53,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004696960] [2021-11-16 21:29:53,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:53,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:29:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:29:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:29:53,788 INFO L87 Difference]: Start difference. First operand 321 states and 471 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-16 21:29:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:53,811 INFO L93 Difference]: Finished difference Result 479 states and 719 transitions. [2021-11-16 21:29:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:29:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 83 [2021-11-16 21:29:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:53,813 INFO L225 Difference]: With dead ends: 479 [2021-11-16 21:29:53,813 INFO L226 Difference]: Without dead ends: 316 [2021-11-16 21:29:53,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:29:53,814 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:53,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-16 21:29:53,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-11-16 21:29:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.3065134099616857) internal successors, (341), 279 states have internal predecessors, (341), 31 states have call successors, (31), 11 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-16 21:29:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 460 transitions. [2021-11-16 21:29:53,826 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 460 transitions. Word has length 83 [2021-11-16 21:29:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:53,826 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 460 transitions. [2021-11-16 21:29:53,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-16 21:29:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 460 transitions. [2021-11-16 21:29:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 21:29:53,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:53,828 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-16 21:29:53,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 21:29:54,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -723653896, now seen corresponding path program 1 times [2021-11-16 21:29:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:54,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082727452] [2021-11-16 21:29:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:29:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:29:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:29:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:29:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-16 21:29:54,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:54,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082727452] [2021-11-16 21:29:54,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082727452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:54,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981845819] [2021-11-16 21:29:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:54,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:54,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:54,205 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) [2021-11-16 21:29:54,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 21:29:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:29:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 21:29:54,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981845819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:54,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-16 21:29:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858086511] [2021-11-16 21:29:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:54,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:29:54,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:29:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:29:54,402 INFO L87 Difference]: Start difference. First operand 316 states and 460 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-16 21:29:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:54,422 INFO L93 Difference]: Finished difference Result 450 states and 674 transitions. [2021-11-16 21:29:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:29:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 83 [2021-11-16 21:29:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:54,423 INFO L225 Difference]: With dead ends: 450 [2021-11-16 21:29:54,423 INFO L226 Difference]: Without dead ends: 191 [2021-11-16 21:29:54,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:29:54,425 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:54,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-16 21:29:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-11-16 21:29:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 160 states have internal predecessors, (181), 21 states have call successors, (21), 10 states have call predecessors, (21), 16 states have return successors, (43), 17 states have call predecessors, (43), 20 states have call successors, (43) [2021-11-16 21:29:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-16 21:29:54,431 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 83 [2021-11-16 21:29:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:54,432 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-16 21:29:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-16 21:29:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-16 21:29:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 21:29:54,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:54,433 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-16 21:29:54,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:54,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-16 21:29:54,649 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 340955510, now seen corresponding path program 1 times [2021-11-16 21:29:54,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:54,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230525586] [2021-11-16 21:29:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:54,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 21:29:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:29:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:29:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:29:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 21:29:54,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:54,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230525586] [2021-11-16 21:29:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230525586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:54,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323739607] [2021-11-16 21:29:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:54,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:54,708 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) [2021-11-16 21:29:54,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 21:29:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:29:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-16 21:29:54,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:29:54,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323739607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:29:54,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:29:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 21:29:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49152871] [2021-11-16 21:29:54,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:29:54,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:29:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:29:54,910 INFO L87 Difference]: Start difference. First operand 188 states and 245 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) [2021-11-16 21:29:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:54,928 INFO L93 Difference]: Finished difference Result 316 states and 424 transitions. [2021-11-16 21:29:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:29:54,929 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 83 [2021-11-16 21:29:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:54,930 INFO L225 Difference]: With dead ends: 316 [2021-11-16 21:29:54,930 INFO L226 Difference]: Without dead ends: 172 [2021-11-16 21:29:54,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:29:54,931 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:54,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 245 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-16 21:29:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-11-16 21:29:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 135 states have internal predecessors, (152), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) [2021-11-16 21:29:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 208 transitions. [2021-11-16 21:29:54,937 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 208 transitions. Word has length 83 [2021-11-16 21:29:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:54,937 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 208 transitions. [2021-11-16 21:29:54,937 INFO L471 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) [2021-11-16 21:29:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 208 transitions. [2021-11-16 21:29:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-16 21:29:54,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:54,938 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-16 21:29:54,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:55,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-16 21:29:55,155 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2021-11-16 21:29:55,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:55,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247325324] [2021-11-16 21:29:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:55,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:29:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:29:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:29:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:29:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:29:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 21:29:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:29:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 21:29:55,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247325324] [2021-11-16 21:29:55,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247325324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654718069] [2021-11-16 21:29:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:55,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:55,296 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) [2021-11-16 21:29:55,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 21:29:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:55,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-16 21:29:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:55,438 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:29:55,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:29:55,464 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:29:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:29:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 21:29:59,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 21:29:59,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654718069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:59,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:59,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 10] total 27 [2021-11-16 21:29:59,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608963666] [2021-11-16 21:29:59,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:59,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:29:59,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:29:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:29:59,608 INFO L87 Difference]: Start difference. First operand 162 states and 208 transitions. Second operand has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 21:30:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:00,137 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2021-11-16 21:30:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 21:30:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 84 [2021-11-16 21:30:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:00,139 INFO L225 Difference]: With dead ends: 338 [2021-11-16 21:30:00,140 INFO L226 Difference]: Without dead ends: 228 [2021-11-16 21:30:00,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-11-16 21:30:00,141 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 142 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1171 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-11-16 21:30:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-16 21:30:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2021-11-16 21:30:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.2298136645962734) internal successors, (198), 168 states have internal predecessors, (198), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-16 21:30:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 246 transitions. [2021-11-16 21:30:00,159 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 246 transitions. Word has length 84 [2021-11-16 21:30:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:00,160 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 246 transitions. [2021-11-16 21:30:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 21:30:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 246 transitions. [2021-11-16 21:30:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 21:30:00,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:00,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-16 21:30:00,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:00,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 21:30:00,377 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1135728258, now seen corresponding path program 1 times [2021-11-16 21:30:00,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:00,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167939504] [2021-11-16 21:30:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:00,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 21:30:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:30:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 21:30:00,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:00,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167939504] [2021-11-16 21:30:00,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167939504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:00,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811436072] [2021-11-16 21:30:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:00,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:00,548 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) [2021-11-16 21:30:00,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 21:30:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:30:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 21:30:00,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:30:00,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811436072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:30:00,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:30:00,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-16 21:30:00,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552652232] [2021-11-16 21:30:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:00,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:30:00,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:30:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:30:00,797 INFO L87 Difference]: Start difference. First operand 198 states and 246 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 21:30:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:00,926 INFO L93 Difference]: Finished difference Result 291 states and 362 transitions. [2021-11-16 21:30:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:30:00,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 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 86 [2021-11-16 21:30:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:00,933 INFO L225 Difference]: With dead ends: 291 [2021-11-16 21:30:00,933 INFO L226 Difference]: Without dead ends: 200 [2021-11-16 21:30:00,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:30:00,940 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 111 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:00,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 294 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:30:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-16 21:30:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-11-16 21:30:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 168 states have internal predecessors, (195), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-16 21:30:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2021-11-16 21:30:00,965 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 86 [2021-11-16 21:30:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:00,966 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2021-11-16 21:30:00,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 21:30:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2021-11-16 21:30:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 21:30:00,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:00,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:00,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:01,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-16 21:30:01,182 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash -919871633, now seen corresponding path program 1 times [2021-11-16 21:30:01,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:01,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154399546] [2021-11-16 21:30:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:01,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:30:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 21:30:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 21:30:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:01,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154399546] [2021-11-16 21:30:01,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154399546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:01,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399488527] [2021-11-16 21:30:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:01,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:01,317 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) [2021-11-16 21:30:01,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 21:30:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:01,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-16 21:30:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 21:30:01,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:30:01,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399488527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:30:01,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:30:01,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-16 21:30:01,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658067562] [2021-11-16 21:30:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:01,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:30:01,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:30:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:30:01,595 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 21:30:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:01,766 INFO L93 Difference]: Finished difference Result 301 states and 373 transitions. [2021-11-16 21:30:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:30:01,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 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 88 [2021-11-16 21:30:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:01,768 INFO L225 Difference]: With dead ends: 301 [2021-11-16 21:30:01,768 INFO L226 Difference]: Without dead ends: 208 [2021-11-16 21:30:01,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-16 21:30:01,769 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 143 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:01,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:30:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-16 21:30:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 195. [2021-11-16 21:30:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 165 states have internal predecessors, (189), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-16 21:30:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2021-11-16 21:30:01,785 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 88 [2021-11-16 21:30:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:01,785 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2021-11-16 21:30:01,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 21:30:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2021-11-16 21:30:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-16 21:30:01,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:01,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:01,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:02,004 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1613305023, now seen corresponding path program 1 times [2021-11-16 21:30:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:02,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226344755] [2021-11-16 21:30:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:02,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 21:30:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 21:30:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:30:02,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226344755] [2021-11-16 21:30:02,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226344755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:02,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35593176] [2021-11-16 21:30:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:02,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:02,100 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) [2021-11-16 21:30:02,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 21:30:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-16 21:30:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 21:30:02,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:30:02,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35593176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:02,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:02,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-11-16 21:30:02,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148293267] [2021-11-16 21:30:02,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:02,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 21:30:02,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 21:30:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:30:02,708 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:30:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:02,822 INFO L93 Difference]: Finished difference Result 289 states and 358 transitions. [2021-11-16 21:30:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:30:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2021-11-16 21:30:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:02,849 INFO L225 Difference]: With dead ends: 289 [2021-11-16 21:30:02,849 INFO L226 Difference]: Without dead ends: 207 [2021-11-16 21:30:02,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:30:02,851 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 10 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:02,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1220 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:30:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-16 21:30:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-11-16 21:30:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 159 states have internal predecessors, (182), 19 states have call successors, (19), 13 states have call predecessors, (19), 15 states have return successors, (27), 15 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-16 21:30:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2021-11-16 21:30:02,862 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 97 [2021-11-16 21:30:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:02,862 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2021-11-16 21:30:02,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:30:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2021-11-16 21:30:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 21:30:02,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:02,863 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:02,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:03,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-16 21:30:03,081 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2021-11-16 21:30:03,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:03,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935829850] [2021-11-16 21:30:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:03,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:30:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:30:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 21:30:03,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:03,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935829850] [2021-11-16 21:30:03,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935829850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:03,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707265334] [2021-11-16 21:30:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:03,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:03,351 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) [2021-11-16 21:30:03,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 21:30:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:03,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-16 21:30:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:03,523 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-16 21:30:03,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2021-11-16 21:30:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 21:30:04,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:04,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2021-11-16 21:30:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 21:30:04,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707265334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:04,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:04,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 30 [2021-11-16 21:30:04,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195531528] [2021-11-16 21:30:04,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 21:30:04,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 21:30:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:30:04,901 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-16 21:30:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:05,418 INFO L93 Difference]: Finished difference Result 389 states and 478 transitions. [2021-11-16 21:30:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-16 21:30:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) Word has length 100 [2021-11-16 21:30:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:05,427 INFO L225 Difference]: With dead ends: 389 [2021-11-16 21:30:05,427 INFO L226 Difference]: Without dead ends: 325 [2021-11-16 21:30:05,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=2310, Unknown=0, NotChecked=0, Total=2652 [2021-11-16 21:30:05,429 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 110 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:05,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1124 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 232 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-11-16 21:30:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-16 21:30:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 294. [2021-11-16 21:30:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 239 states have (on average 1.200836820083682) internal successors, (287), 248 states have internal predecessors, (287), 28 states have call successors, (28), 20 states have call predecessors, (28), 26 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-11-16 21:30:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 357 transitions. [2021-11-16 21:30:05,440 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 357 transitions. Word has length 100 [2021-11-16 21:30:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:05,440 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 357 transitions. [2021-11-16 21:30:05,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-16 21:30:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 357 transitions. [2021-11-16 21:30:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 21:30:05,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:05,441 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:05,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-16 21:30:05,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-16 21:30:05,655 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2021-11-16 21:30:05,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:05,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170800765] [2021-11-16 21:30:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:05,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:30:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:30:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-16 21:30:05,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:05,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170800765] [2021-11-16 21:30:05,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170800765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:05,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298023527] [2021-11-16 21:30:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:05,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:05,947 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) [2021-11-16 21:30:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 21:30:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-16 21:30:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:06,144 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:30:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:30:06,158 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:30:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:30:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 21:30:12,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 21:30:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298023527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:13,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:13,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 12] total 33 [2021-11-16 21:30:13,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186967275] [2021-11-16 21:30:13,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:13,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 21:30:13,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 21:30:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 21:30:13,037 INFO L87 Difference]: Start difference. First operand 294 states and 357 transitions. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-16 21:30:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:13,858 INFO L93 Difference]: Finished difference Result 449 states and 540 transitions. [2021-11-16 21:30:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 21:30:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 100 [2021-11-16 21:30:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:13,860 INFO L225 Difference]: With dead ends: 449 [2021-11-16 21:30:13,860 INFO L226 Difference]: Without dead ends: 386 [2021-11-16 21:30:13,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2021-11-16 21:30:13,861 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 167 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:13,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1088 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-11-16 21:30:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-16 21:30:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 258. [2021-11-16 21:30:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 211 states have (on average 1.2085308056872037) internal successors, (255), 219 states have internal predecessors, (255), 23 states have call successors, (23), 17 states have call predecessors, (23), 23 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2021-11-16 21:30:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2021-11-16 21:30:13,874 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 100 [2021-11-16 21:30:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:13,874 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2021-11-16 21:30:13,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-16 21:30:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2021-11-16 21:30:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 21:30:13,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:13,875 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:13,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:14,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 21:30:14,096 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2021-11-16 21:30:14,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:14,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210289693] [2021-11-16 21:30:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:14,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:30:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:30:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 21:30:14,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:14,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210289693] [2021-11-16 21:30:14,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210289693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:14,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109375672] [2021-11-16 21:30:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:14,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:14,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:14,327 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) [2021-11-16 21:30:14,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 21:30:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-16 21:30:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:14,482 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:30:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-16 21:30:28,538 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:30:52,808 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:02,911 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:13,099 WARN L227 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:19,172 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:29,303 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:39,365 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:31:55,466 WARN L227 SmtUtils]: Spent 16.00s on a formula simplification. DAG size of input: 33 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:32:05,739 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:32:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 21:32:07,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:32:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-16 21:32:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-16 21:32:21,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109375672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:32:21,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:32:21,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 37 [2021-11-16 21:32:21,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438985317] [2021-11-16 21:32:21,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:32:21,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-16 21:32:21,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:32:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-16 21:32:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1169, Unknown=18, NotChecked=0, Total=1332 [2021-11-16 21:32:21,836 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-16 21:32:31,947 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:32:41,990 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:32:50,066 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:33:10,132 WARN L227 SmtUtils]: Spent 20.05s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:33:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:33:30,651 INFO L93 Difference]: Finished difference Result 559 states and 674 transitions. [2021-11-16 21:33:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 21:33:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 100 [2021-11-16 21:33:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:33:30,653 INFO L225 Difference]: With dead ends: 559 [2021-11-16 21:33:30,653 INFO L226 Difference]: Without dead ends: 496 [2021-11-16 21:33:30,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 194.5s TimeCoverageRelationStatistics Valid=299, Invalid=2535, Unknown=28, NotChecked=0, Total=2862 [2021-11-16 21:33:30,655 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 146 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:33:30,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2214 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 484 Unchecked, 0.1s Time] [2021-11-16 21:33:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-16 21:33:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 310. [2021-11-16 21:33:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 253 states have (on average 1.2015810276679841) internal successors, (304), 260 states have internal predecessors, (304), 28 states have call successors, (28), 20 states have call predecessors, (28), 28 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2021-11-16 21:33:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 373 transitions. [2021-11-16 21:33:30,678 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 373 transitions. Word has length 100 [2021-11-16 21:33:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:33:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 373 transitions. [2021-11-16 21:33:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-16 21:33:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 373 transitions. [2021-11-16 21:33:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 21:33:30,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:33:30,680 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:33:30,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 21:33:30,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:30,900 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:33:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:33:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2021-11-16 21:33:30,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:33:30,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633002397] [2021-11-16 21:33:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:33:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:33:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:33:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:33:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:33:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:33:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:33:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:33:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 21:33:31,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:33:31,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633002397] [2021-11-16 21:33:31,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633002397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:33:31,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224978997] [2021-11-16 21:33:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:31,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:31,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:33:31,072 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) [2021-11-16 21:33:31,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 21:33:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:33:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:33:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-16 21:33:31,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:33:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224978997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:33:31,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:33:31,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-16 21:33:31,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069223217] [2021-11-16 21:33:31,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:33:31,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:33:31,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:33:31,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:33:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:33:31,375 INFO L87 Difference]: Start difference. First operand 310 states and 373 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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) [2021-11-16 21:33:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:33:31,454 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2021-11-16 21:33:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:33:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 100 [2021-11-16 21:33:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:33:31,456 INFO L225 Difference]: With dead ends: 375 [2021-11-16 21:33:31,456 INFO L226 Difference]: Without dead ends: 301 [2021-11-16 21:33:31,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:33:31,457 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:33:31,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 248 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:33:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-16 21:33:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 294. [2021-11-16 21:33:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 238 states have (on average 1.1932773109243697) internal successors, (284), 245 states have internal predecessors, (284), 28 states have call successors, (28), 20 states have call predecessors, (28), 27 states have return successors, (39), 28 states have call predecessors, (39), 27 states have call successors, (39) [2021-11-16 21:33:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 351 transitions. [2021-11-16 21:33:31,478 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 351 transitions. Word has length 100 [2021-11-16 21:33:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:33:31,478 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 351 transitions. [2021-11-16 21:33:31,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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) [2021-11-16 21:33:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 351 transitions. [2021-11-16 21:33:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-16 21:33:31,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:33:31,479 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:33:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 21:33:31,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:31,698 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:33:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:33:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash 855153545, now seen corresponding path program 1 times [2021-11-16 21:33:31,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:33:31,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628339211] [2021-11-16 21:33:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:31,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:33:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:33:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:33:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:33:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:33:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:33:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:33:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:33:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:33:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 21:33:31,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:33:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628339211] [2021-11-16 21:33:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628339211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:33:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629420510] [2021-11-16 21:33:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:31,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:33:31,885 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) [2021-11-16 21:33:31,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 21:33:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-16 21:33:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:33:32,067 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:33:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:33:32,082 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:33:32,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:33:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 21:33:40,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:33:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-16 21:33:41,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629420510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:33:41,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:33:41,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 14] total 43 [2021-11-16 21:33:41,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386027265] [2021-11-16 21:33:41,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:33:41,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 21:33:41,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:33:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 21:33:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-11-16 21:33:41,392 INFO L87 Difference]: Start difference. First operand 294 states and 351 transitions. Second operand has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-16 21:33:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:33:44,348 INFO L93 Difference]: Finished difference Result 523 states and 669 transitions. [2021-11-16 21:33:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-16 21:33:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) Word has length 110 [2021-11-16 21:33:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:33:44,350 INFO L225 Difference]: With dead ends: 523 [2021-11-16 21:33:44,350 INFO L226 Difference]: Without dead ends: 418 [2021-11-16 21:33:44,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=346, Invalid=3560, Unknown=0, NotChecked=0, Total=3906 [2021-11-16 21:33:44,352 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 160 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:33:44,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2003 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1734 Invalid, 0 Unknown, 346 Unchecked, 0.9s Time] [2021-11-16 21:33:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-16 21:33:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 321. [2021-11-16 21:33:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 266 states have internal predecessors, (311), 30 states have call successors, (30), 21 states have call predecessors, (30), 30 states have return successors, (42), 33 states have call predecessors, (42), 29 states have call successors, (42) [2021-11-16 21:33:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 383 transitions. [2021-11-16 21:33:44,399 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 383 transitions. Word has length 110 [2021-11-16 21:33:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:33:44,399 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 383 transitions. [2021-11-16 21:33:44,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-16 21:33:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 383 transitions. [2021-11-16 21:33:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 21:33:44,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:33:44,400 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:33:44,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 21:33:44,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-16 21:33:44,616 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:33:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:33:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2021-11-16 21:33:44,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:33:44,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119005780] [2021-11-16 21:33:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:44,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:33:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:33:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:33:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:33:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:33:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:33:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:44,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:33:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:33:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:45,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:33:45,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:33:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119005780] [2021-11-16 21:33:45,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119005780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:33:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882060651] [2021-11-16 21:33:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:45,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:45,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:33:45,272 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) [2021-11-16 21:33:45,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 21:33:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-16 21:33:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:33:45,458 INFO L388 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 14 treesize of output 15 [2021-11-16 21:33:45,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-16 21:33:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-16 21:33:47,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:33:58,981 WARN L227 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:34:09,329 WARN L227 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:34:10,372 INFO L354 Elim1Store]: treesize reduction 331, result has 32.4 percent of original size [2021-11-16 21:34:10,373 INFO L388 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 1587 treesize of output 1585 [2021-11-16 21:34:10,632 INFO L354 Elim1Store]: treesize reduction 453, result has 25.0 percent of original size [2021-11-16 21:34:10,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 4774 treesize of output 4504 [2021-11-16 21:34:10,820 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-16 21:34:10,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3764 treesize of output 3676 [2021-11-16 21:34:10,947 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-11-16 21:34:10,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3672 treesize of output 3532 [2021-11-16 21:34:11,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-16 21:34:11,163 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:34:11,236 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 21:34:11,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:34:11,600 INFO L388 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 19 treesize of output 23 [2021-11-16 21:34:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:13,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:13,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:13,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:13,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:14,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:14,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:14,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:14,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-16 21:34:14,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:14,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:15,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:15,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:34:15,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:15,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-16 21:34:17,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:34:17,532 INFO L388 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 19 treesize of output 23 [2021-11-16 21:34:20,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 21:34:20,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-16 21:34:20,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 21:34:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-16 21:34:20,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-16 21:34:20,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-16 21:34:20,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:20,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-16 21:34:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-16 21:34:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-11-16 21:34:22,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:34:22,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:34:22,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 162 [2021-11-16 21:34:23,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-16 21:34:23,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-16 21:34:23,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:34:23,363 INFO L388 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 87 treesize of output 85 [2021-11-16 21:34:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 46 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-16 21:34:23,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882060651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:34:23,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:34:23,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 62 [2021-11-16 21:34:23,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342939323] [2021-11-16 21:34:23,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:34:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-16 21:34:23,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-16 21:34:23,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-11-16 21:34:23,562 INFO L87 Difference]: Start difference. First operand 321 states and 383 transitions. Second operand has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-16 21:34:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:25,716 INFO L93 Difference]: Finished difference Result 743 states and 953 transitions. [2021-11-16 21:34:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-16 21:34:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) Word has length 113 [2021-11-16 21:34:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:25,721 INFO L225 Difference]: With dead ends: 743 [2021-11-16 21:34:25,721 INFO L226 Difference]: Without dead ends: 683 [2021-11-16 21:34:25,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2021-11-16 21:34:25,723 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:25,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1901 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1542 Invalid, 0 Unknown, 381 Unchecked, 1.1s Time] [2021-11-16 21:34:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-16 21:34:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 522. [2021-11-16 21:34:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 431 states have internal predecessors, (503), 49 states have call successors, (49), 30 states have call predecessors, (49), 52 states have return successors, (85), 60 states have call predecessors, (85), 48 states have call successors, (85) [2021-11-16 21:34:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 637 transitions. [2021-11-16 21:34:25,763 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 637 transitions. Word has length 113 [2021-11-16 21:34:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:25,763 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 637 transitions. [2021-11-16 21:34:25,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-16 21:34:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 637 transitions. [2021-11-16 21:34:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 21:34:25,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:25,765 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:34:25,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 21:34:25,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-16 21:34:25,984 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1807516699, now seen corresponding path program 1 times [2021-11-16 21:34:25,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:25,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153503937] [2021-11-16 21:34:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:25,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:34:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:34:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:34:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:34:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:34:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 21:34:26,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:26,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153503937] [2021-11-16 21:34:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153503937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:26,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57174869] [2021-11-16 21:34:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:26,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:26,253 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) [2021-11-16 21:34:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 21:34:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-16 21:34:26,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:26,472 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:34:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:34:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-16 21:34:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:34:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 157 [2021-11-16 21:34:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 21:34:34,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57174869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:34:34,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:34:34,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 20] total 49 [2021-11-16 21:34:34,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941097704] [2021-11-16 21:34:34,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:34:34,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-16 21:34:34,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:34,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-16 21:34:34,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2021-11-16 21:34:34,754 INFO L87 Difference]: Start difference. First operand 522 states and 637 transitions. Second operand has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-16 21:34:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:55,783 INFO L93 Difference]: Finished difference Result 1533 states and 2162 transitions. [2021-11-16 21:34:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-16 21:34:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) Word has length 113 [2021-11-16 21:34:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:55,789 INFO L225 Difference]: With dead ends: 1533 [2021-11-16 21:34:55,789 INFO L226 Difference]: Without dead ends: 1250 [2021-11-16 21:34:55,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2969 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=921, Invalid=8382, Unknown=9, NotChecked=0, Total=9312 [2021-11-16 21:34:55,792 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 484 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 2460 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1326 Invalid, 0 Unknown, 1561 Unchecked, 0.9s Time] [2021-11-16 21:34:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-16 21:34:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 836. [2021-11-16 21:34:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 671 states have (on average 1.2056631892697467) internal successors, (809), 689 states have internal predecessors, (809), 78 states have call successors, (78), 42 states have call predecessors, (78), 86 states have return successors, (179), 104 states have call predecessors, (179), 77 states have call successors, (179) [2021-11-16 21:34:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1066 transitions. [2021-11-16 21:34:55,872 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1066 transitions. Word has length 113 [2021-11-16 21:34:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:55,873 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1066 transitions. [2021-11-16 21:34:55,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-16 21:34:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1066 transitions. [2021-11-16 21:34:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-16 21:34:55,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:55,875 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:34:55,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 21:34:56,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:56,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1476333347, now seen corresponding path program 1 times [2021-11-16 21:34:56,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:56,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488950619] [2021-11-16 21:34:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:56,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:34:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:34:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:34:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:34:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:34:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 21:34:56,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:56,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488950619] [2021-11-16 21:34:56,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488950619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:56,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050244138] [2021-11-16 21:34:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:56,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:56,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:56,328 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) [2021-11-16 21:34:56,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 21:34:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 21:34:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 21:34:56,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:34:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050244138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:34:56,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:34:56,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-16 21:34:56,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013694362] [2021-11-16 21:34:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:34:56,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:34:56,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:34:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:34:56,733 INFO L87 Difference]: Start difference. First operand 836 states and 1066 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 21:34:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:57,125 INFO L93 Difference]: Finished difference Result 1931 states and 2552 transitions. [2021-11-16 21:34:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:34:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-11-16 21:34:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:57,129 INFO L225 Difference]: With dead ends: 1931 [2021-11-16 21:34:57,129 INFO L226 Difference]: Without dead ends: 899 [2021-11-16 21:34:57,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-16 21:34:57,132 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:57,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 423 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:34:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-16 21:34:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 795. [2021-11-16 21:34:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 635 states have (on average 1.1811023622047243) internal successors, (750), 661 states have internal predecessors, (750), 74 states have call successors, (74), 42 states have call predecessors, (74), 85 states have return successors, (147), 91 states have call predecessors, (147), 73 states have call successors, (147) [2021-11-16 21:34:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 971 transitions. [2021-11-16 21:34:57,194 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 971 transitions. Word has length 113 [2021-11-16 21:34:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:57,195 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 971 transitions. [2021-11-16 21:34:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-16 21:34:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 971 transitions. [2021-11-16 21:34:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:34:57,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:57,197 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:34:57,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-16 21:34:57,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:57,414 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2021-11-16 21:34:57,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:57,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515818658] [2021-11-16 21:34:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:57,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:34:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:34:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:34:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:34:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:34:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-16 21:34:57,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:57,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515818658] [2021-11-16 21:34:57,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515818658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:34:57,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:34:57,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:34:57,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031536393] [2021-11-16 21:34:57,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:34:57,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:34:57,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:34:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:34:57,544 INFO L87 Difference]: Start difference. First operand 795 states and 971 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-11-16 21:34:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:57,641 INFO L93 Difference]: Finished difference Result 855 states and 1035 transitions. [2021-11-16 21:34:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:34:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 116 [2021-11-16 21:34:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:57,644 INFO L225 Difference]: With dead ends: 855 [2021-11-16 21:34:57,644 INFO L226 Difference]: Without dead ends: 853 [2021-11-16 21:34:57,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:34:57,645 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:57,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:34:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-16 21:34:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 812. [2021-11-16 21:34:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 647 states have (on average 1.17774343122102) internal successors, (762), 676 states have internal predecessors, (762), 75 states have call successors, (75), 43 states have call predecessors, (75), 89 states have return successors, (154), 92 states have call predecessors, (154), 74 states have call successors, (154) [2021-11-16 21:34:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 991 transitions. [2021-11-16 21:34:57,705 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 991 transitions. Word has length 116 [2021-11-16 21:34:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:57,706 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 991 transitions. [2021-11-16 21:34:57,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-11-16 21:34:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 991 transitions. [2021-11-16 21:34:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 21:34:57,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:57,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:57,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-16 21:34:57,708 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash 509544598, now seen corresponding path program 1 times [2021-11-16 21:34:57,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:57,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791859456] [2021-11-16 21:34:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:57,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:34:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:34:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:34:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 21:34:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:34:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 21:34:57,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:57,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791859456] [2021-11-16 21:34:57,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791859456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:57,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649754247] [2021-11-16 21:34:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:57,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:57,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:57,860 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) [2021-11-16 21:34:57,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 21:34:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-16 21:34:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:58,032 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:34:58,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:34:58,048 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:34:58,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:35:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 21:35:13,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:35:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 11 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-16 21:35:14,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649754247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:35:14,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:35:14,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 12] total 34 [2021-11-16 21:35:14,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122429103] [2021-11-16 21:35:14,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:35:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 21:35:14,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 21:35:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=998, Unknown=5, NotChecked=0, Total=1122 [2021-11-16 21:35:14,032 INFO L87 Difference]: Start difference. First operand 812 states and 991 transitions. Second operand has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-16 21:35:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:22,789 INFO L93 Difference]: Finished difference Result 1494 states and 1825 transitions. [2021-11-16 21:35:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-16 21:35:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 120 [2021-11-16 21:35:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:22,794 INFO L225 Difference]: With dead ends: 1494 [2021-11-16 21:35:22,794 INFO L226 Difference]: Without dead ends: 1265 [2021-11-16 21:35:22,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=364, Invalid=3530, Unknown=12, NotChecked=0, Total=3906 [2021-11-16 21:35:22,796 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 132 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:22,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1590 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 360 Invalid, 0 Unknown, 404 Unchecked, 0.2s Time] [2021-11-16 21:35:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-11-16 21:35:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1029. [2021-11-16 21:35:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 821 states have (on average 1.1705237515225335) internal successors, (961), 860 states have internal predecessors, (961), 91 states have call successors, (91), 59 states have call predecessors, (91), 116 states have return successors, (195), 109 states have call predecessors, (195), 90 states have call successors, (195) [2021-11-16 21:35:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1247 transitions. [2021-11-16 21:35:22,882 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1247 transitions. Word has length 120 [2021-11-16 21:35:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:22,882 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1247 transitions. [2021-11-16 21:35:22,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-16 21:35:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1247 transitions. [2021-11-16 21:35:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-16 21:35:22,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:22,884 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:35:22,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-16 21:35:23,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-16 21:35:23,099 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 610448605, now seen corresponding path program 1 times [2021-11-16 21:35:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:23,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228176401] [2021-11-16 21:35:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:23,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:35:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:35:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:35:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:35:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-16 21:35:23,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:23,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228176401] [2021-11-16 21:35:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228176401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:35:23,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:35:23,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:35:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825122663] [2021-11-16 21:35:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:35:23,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:35:23,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:35:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:35:23,203 INFO L87 Difference]: Start difference. First operand 1029 states and 1247 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:35:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:23,297 INFO L93 Difference]: Finished difference Result 1035 states and 1252 transitions. [2021-11-16 21:35:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:35:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-11-16 21:35:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:23,300 INFO L225 Difference]: With dead ends: 1035 [2021-11-16 21:35:23,300 INFO L226 Difference]: Without dead ends: 1033 [2021-11-16 21:35:23,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:35:23,301 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:23,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 298 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:35:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-11-16 21:35:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1033. [2021-11-16 21:35:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 824 states have (on average 1.1699029126213591) internal successors, (964), 863 states have internal predecessors, (964), 91 states have call successors, (91), 60 states have call predecessors, (91), 117 states have return successors, (195), 109 states have call predecessors, (195), 90 states have call successors, (195) [2021-11-16 21:35:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1250 transitions. [2021-11-16 21:35:23,383 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1250 transitions. Word has length 122 [2021-11-16 21:35:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:23,383 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1250 transitions. [2021-11-16 21:35:23,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 21:35:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1250 transitions. [2021-11-16 21:35:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-16 21:35:23,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:23,386 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:35:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-16 21:35:23,387 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 409153948, now seen corresponding path program 2 times [2021-11-16 21:35:23,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:23,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944575023] [2021-11-16 21:35:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:23,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:35:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:35:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 21:35:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:35:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 21:35:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-16 21:35:23,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:23,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944575023] [2021-11-16 21:35:23,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944575023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:35:23,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925805853] [2021-11-16 21:35:23,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:35:23,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:23,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:35:23,586 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) [2021-11-16 21:35:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-16 21:35:23,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:35:23,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:35:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-16 21:35:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:35:24,870 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0)))) is different from true [2021-11-16 21:35:25,874 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0)))) is different from true [2021-11-16 21:35:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 90 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 7 not checked. [2021-11-16 21:35:26,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:35:26,778 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 21:35:26,778 INFO L388 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 32 treesize of output 31 [2021-11-16 21:35:26,782 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-16 21:35:26,782 INFO L388 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 27 treesize of output 19 [2021-11-16 21:35:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-16 21:35:26,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925805853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:35:26,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:35:26,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 27 [2021-11-16 21:35:26,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468276946] [2021-11-16 21:35:26,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:35:26,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:35:26,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:35:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2021-11-16 21:35:26,846 INFO L87 Difference]: Start difference. First operand 1033 states and 1250 transitions. Second operand has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-16 21:35:28,004 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))))) is different from true [2021-11-16 21:35:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:28,485 INFO L93 Difference]: Finished difference Result 1175 states and 1479 transitions. [2021-11-16 21:35:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-16 21:35:28,485 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 122 [2021-11-16 21:35:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:28,489 INFO L225 Difference]: With dead ends: 1175 [2021-11-16 21:35:28,489 INFO L226 Difference]: Without dead ends: 1107 [2021-11-16 21:35:28,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 250 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=232, Invalid=1417, Unknown=3, NotChecked=240, Total=1892 [2021-11-16 21:35:28,490 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 152 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:28,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 781 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 490 Invalid, 0 Unknown, 378 Unchecked, 0.2s Time] [2021-11-16 21:35:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-16 21:35:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 760. [2021-11-16 21:35:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 606 states have (on average 1.1716171617161717) internal successors, (710), 633 states have internal predecessors, (710), 68 states have call successors, (68), 46 states have call predecessors, (68), 85 states have return successors, (134), 80 states have call predecessors, (134), 67 states have call successors, (134) [2021-11-16 21:35:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 912 transitions. [2021-11-16 21:35:28,558 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 912 transitions. Word has length 122 [2021-11-16 21:35:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:28,559 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 912 transitions. [2021-11-16 21:35:28,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-16 21:35:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 912 transitions. [2021-11-16 21:35:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-16 21:35:28,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:28,561 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-11-16 21:35:28,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-16 21:35:28,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-16 21:35:28,779 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1188561693, now seen corresponding path program 2 times [2021-11-16 21:35:28,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:28,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027885565] [2021-11-16 21:35:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:28,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:28,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:28,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:28,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:35:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:28,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:35:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:35:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-16 21:35:29,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:29,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027885565] [2021-11-16 21:35:29,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027885565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:35:29,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23440658] [2021-11-16 21:35:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:35:29,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:35:29,202 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) [2021-11-16 21:35:29,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-16 21:35:29,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:35:29,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:35:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-16 21:35:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:35:29,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-16 21:35:29,424 INFO L388 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 14 treesize of output 15 [2021-11-16 21:35:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 121 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 21:35:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:35:33,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:35:33,460 INFO L354 Elim1Store]: treesize reduction 45, result has 85.0 percent of original size [2021-11-16 21:35:33,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 1146 treesize of output 1213 [2021-11-16 21:35:33,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1643 treesize of output 1599 [2021-11-16 21:35:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 53 proven. 40 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-16 21:35:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23440658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:35:36,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:35:36,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 56 [2021-11-16 21:35:36,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036107884] [2021-11-16 21:35:36,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:35:36,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-16 21:35:36,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-16 21:35:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2021-11-16 21:35:36,280 INFO L87 Difference]: Start difference. First operand 760 states and 912 transitions. Second operand has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) [2021-11-16 21:35:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:40,339 INFO L93 Difference]: Finished difference Result 1564 states and 2061 transitions. [2021-11-16 21:35:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-16 21:35:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) Word has length 135 [2021-11-16 21:35:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:40,357 INFO L225 Difference]: With dead ends: 1564 [2021-11-16 21:35:40,371 INFO L226 Difference]: Without dead ends: 1340 [2021-11-16 21:35:40,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 263 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=711, Invalid=8991, Unknown=0, NotChecked=0, Total=9702 [2021-11-16 21:35:40,373 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 191 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 3605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:40,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 3619 Invalid, 3605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2975 Invalid, 0 Unknown, 401 Unchecked, 1.8s Time] [2021-11-16 21:35:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-11-16 21:35:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1131. [2021-11-16 21:35:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 898 states have (on average 1.1893095768374164) internal successors, (1068), 922 states have internal predecessors, (1068), 115 states have call successors, (115), 62 states have call predecessors, (115), 117 states have return successors, (247), 146 states have call predecessors, (247), 114 states have call successors, (247) [2021-11-16 21:35:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1430 transitions. [2021-11-16 21:35:40,494 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1430 transitions. Word has length 135 [2021-11-16 21:35:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1430 transitions. [2021-11-16 21:35:40,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) [2021-11-16 21:35:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1430 transitions. [2021-11-16 21:35:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-16 21:35:40,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:40,497 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-16 21:35:40,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-16 21:35:40,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-16 21:35:40,716 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2081362468, now seen corresponding path program 1 times [2021-11-16 21:35:40,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:40,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622723804] [2021-11-16 21:35:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:40,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:35:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:35:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:35:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 21:35:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:35:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-16 21:35:41,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:41,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622723804] [2021-11-16 21:35:41,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622723804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:35:41,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839058668] [2021-11-16 21:35:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:41,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:41,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:35:41,011 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) [2021-11-16 21:35:41,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-16 21:35:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-16 21:35:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:35:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:35:41,257 INFO L388 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 29 treesize of output 17 [2021-11-16 21:35:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:35:41,346 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-16 21:35:41,346 INFO L388 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 44 [2021-11-16 21:35:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-16 21:35:44,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:35:50,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6070 treesize of output 6006 [2021-11-16 21:35:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-16 21:35:50,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839058668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:35:50,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:35:50,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2021-11-16 21:35:50,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141581340] [2021-11-16 21:35:50,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:35:50,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:35:50,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:50,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:35:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=837, Unknown=4, NotChecked=0, Total=930 [2021-11-16 21:35:50,985 INFO L87 Difference]: Start difference. First operand 1131 states and 1430 transitions. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 21:35:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:53,915 INFO L93 Difference]: Finished difference Result 1800 states and 2323 transitions. [2021-11-16 21:35:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 21:35:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) Word has length 126 [2021-11-16 21:35:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:53,928 INFO L225 Difference]: With dead ends: 1800 [2021-11-16 21:35:53,928 INFO L226 Difference]: Without dead ends: 1259 [2021-11-16 21:35:53,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=200, Invalid=1775, Unknown=5, NotChecked=0, Total=1980 [2021-11-16 21:35:53,930 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 160 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:53,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1594 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 556 Invalid, 0 Unknown, 296 Unchecked, 0.3s Time] [2021-11-16 21:35:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-11-16 21:35:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1167. [2021-11-16 21:35:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 929 states have (on average 1.186221743810549) internal successors, (1102), 954 states have internal predecessors, (1102), 118 states have call successors, (118), 64 states have call predecessors, (118), 119 states have return successors, (250), 148 states have call predecessors, (250), 117 states have call successors, (250) [2021-11-16 21:35:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1470 transitions. [2021-11-16 21:35:54,069 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1470 transitions. Word has length 126 [2021-11-16 21:35:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:54,069 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1470 transitions. [2021-11-16 21:35:54,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 21:35:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1470 transitions. [2021-11-16 21:35:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-16 21:35:54,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:54,072 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-16 21:35:54,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-16 21:35:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:54,288 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 594113950, now seen corresponding path program 3 times [2021-11-16 21:35:54,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:54,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850061479] [2021-11-16 21:35:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:54,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:35:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:35:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:35:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 21:35:54,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:54,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850061479] [2021-11-16 21:35:54,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850061479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:35:54,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544607601] [2021-11-16 21:35:54,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:35:54,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:35:54,736 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) [2021-11-16 21:35:54,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-16 21:35:54,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-16 21:35:54,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:35:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-16 21:35:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:35:54,956 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:35:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:35:54,972 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:35:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:36:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 21:36:09,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:36:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-16 21:36:10,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544607601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:36:10,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:36:10,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 13] total 50 [2021-11-16 21:36:10,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823377308] [2021-11-16 21:36:10,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:36:10,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-16 21:36:10,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:36:10,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-16 21:36:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2240, Unknown=1, NotChecked=0, Total=2450 [2021-11-16 21:36:10,744 INFO L87 Difference]: Start difference. First operand 1167 states and 1470 transitions. Second operand has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-16 21:36:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:36:15,814 INFO L93 Difference]: Finished difference Result 1937 states and 2522 transitions. [2021-11-16 21:36:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-16 21:36:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) Word has length 124 [2021-11-16 21:36:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:36:15,820 INFO L225 Difference]: With dead ends: 1937 [2021-11-16 21:36:15,820 INFO L226 Difference]: Without dead ends: 1847 [2021-11-16 21:36:15,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=742, Invalid=8763, Unknown=1, NotChecked=0, Total=9506 [2021-11-16 21:36:15,821 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 186 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:36:15,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2445 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1657 Invalid, 0 Unknown, 493 Unchecked, 1.0s Time] [2021-11-16 21:36:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-11-16 21:36:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1437. [2021-11-16 21:36:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1146 states have (on average 1.1972076788830714) internal successors, (1372), 1179 states have internal predecessors, (1372), 134 states have call successors, (134), 74 states have call predecessors, (134), 156 states have return successors, (331), 183 states have call predecessors, (331), 133 states have call successors, (331) [2021-11-16 21:36:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1837 transitions. [2021-11-16 21:36:15,995 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1837 transitions. Word has length 124 [2021-11-16 21:36:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:36:15,995 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 1837 transitions. [2021-11-16 21:36:15,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-16 21:36:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1837 transitions. [2021-11-16 21:36:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-16 21:36:15,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:36:15,998 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 21:36:16,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-16 21:36:16,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:36:16,215 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:36:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:36:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1468779077, now seen corresponding path program 1 times [2021-11-16 21:36:16,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:36:16,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633427099] [2021-11-16 21:36:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:36:16,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:36:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:36:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:36:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:36:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:36:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:36:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:36:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:36:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:36:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:36:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:36:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:36:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-16 21:36:16,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:36:16,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633427099] [2021-11-16 21:36:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633427099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:36:16,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820560192] [2021-11-16 21:36:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:36:16,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:36:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:36:16,532 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) [2021-11-16 21:36:16,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-16 21:36:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:36:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-16 21:36:16,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:36:16,784 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:36:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-16 21:36:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:36:16,901 INFO L354 Elim1Store]: treesize reduction 123, result has 25.0 percent of original size [2021-11-16 21:36:16,901 INFO L388 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 64 [2021-11-16 21:36:17,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:36:17,172 INFO L354 Elim1Store]: treesize reduction 286, result has 23.9 percent of original size [2021-11-16 21:36:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 104 treesize of output 131 [2021-11-16 21:36:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-16 21:36:23,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:37:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26326376 treesize of output 26260840 Killed by 15