./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:59:13,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:59:13,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:59:13,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:59:13,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:59:13,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:59:13,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:59:13,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:59:13,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:59:13,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:59:13,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:59:13,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:59:13,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:59:13,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:59:13,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:59:13,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:59:13,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:59:13,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:59:13,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:59:13,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:59:13,696 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:59:13,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:59:13,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:59:13,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:59:13,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:59:13,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:59:13,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:59:13,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:59:13,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:59:13,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:59:13,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:59:13,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:59:13,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:59:13,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:59:13,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:59:13,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:59:13,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:59:13,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:59:13,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:59:13,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:59:13,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:59:13,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:59:13,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 21:59:13,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:59:13,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:59:13,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:59:13,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:59:13,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:59:13,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:59:13,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:59:13,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:59:13,749 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:59:13,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:59:13,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:59:13,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:59:13,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:59:13,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:59:13,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:59:13,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:59:13,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:59:13,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:59:13,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:59:13,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:59:13,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:59:13,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:59:13,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:59:13,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:59:13,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:59:13,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:59:13,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:59:13,756 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:59:13,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:59:13,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:59:13,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-07-19 21:59:13,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:59:14,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:59:14,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:59:14,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:59:14,014 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:59:14,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-07-19 21:59:14,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93582d37e/b87b493e520a4149b72244bfae1afa92/FLAG6572f286a [2022-07-19 21:59:14,742 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:59:14,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-07-19 21:59:14,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93582d37e/b87b493e520a4149b72244bfae1afa92/FLAG6572f286a [2022-07-19 21:59:15,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93582d37e/b87b493e520a4149b72244bfae1afa92 [2022-07-19 21:59:15,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:59:15,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:59:15,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:59:15,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:59:15,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:59:15,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:59:15" (1/1) ... [2022-07-19 21:59:15,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2754dde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:15, skipping insertion in model container [2022-07-19 21:59:15,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:59:15" (1/1) ... [2022-07-19 21:59:15,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:59:15,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:59:15,410 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_byte_buf_reserve_harness.i[4494,4507] [2022-07-19 21:59:15,417 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_byte_buf_reserve_harness.i[4554,4567] [2022-07-19 21:59:15,983 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:15,984 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:15,985 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:15,986 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:15,986 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:15,998 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,003 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,004 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,008 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,255 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 21:59:16,257 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 21:59:16,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 21:59:16,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 21:59:16,263 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 21:59:16,266 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 21:59:16,267 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 21:59:16,268 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 21:59:16,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 21:59:16,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 21:59:16,387 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 21:59:16,405 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,405 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,496 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,496 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:59:16,638 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:59:16,661 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_byte_buf_reserve_harness.i[4494,4507] [2022-07-19 21:59:16,661 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_byte_buf_reserve_harness.i[4554,4567] [2022-07-19 21:59:16,701 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,702 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,702 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,703 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,705 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,715 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,715 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,716 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,717 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,758 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 21:59:16,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 21:59:16,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 21:59:16,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 21:59:16,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 21:59:16,761 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 21:59:16,761 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 21:59:16,766 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 21:59:16,768 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 21:59:16,769 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 21:59:16,789 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 21:59:16,805 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,805 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,878 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,879 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:59:16,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:59:17,051 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:59:17,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17 WrapperNode [2022-07-19 21:59:17,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:59:17,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:59:17,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:59:17,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:59:17,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,249 INFO L137 Inliner]: procedures = 692, calls = 2621, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 957 [2022-07-19 21:59:17,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:59:17,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:59:17,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:59:17,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:59:17,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:59:17,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:59:17,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:59:17,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:59:17,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (1/1) ... [2022-07-19 21:59:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:59:17,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:17,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:59:17,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:59:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-19 21:59:17,433 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-19 21:59:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:59:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-19 21:59:17,434 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-19 21:59:17,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:59:17,435 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-19 21:59:17,436 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-19 21:59:17,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 21:59:17,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 21:59:17,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:59:17,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:59:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:59:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:59:17,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:59:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-19 21:59:17,437 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-19 21:59:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-07-19 21:59:17,437 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-07-19 21:59:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-07-19 21:59:17,438 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-07-19 21:59:17,439 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-19 21:59:17,439 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-19 21:59:17,439 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 21:59:17,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 21:59:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:59:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:59:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 21:59:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-19 21:59:17,440 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-19 21:59:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-19 21:59:17,440 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-19 21:59:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:59:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:59:17,730 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:59:17,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:59:18,729 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:59:18,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:59:18,739 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:59:18,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:59:18 BoogieIcfgContainer [2022-07-19 21:59:18,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:59:18,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:59:18,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:59:18,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:59:18,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:59:15" (1/3) ... [2022-07-19 21:59:18,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129c1974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:59:18, skipping insertion in model container [2022-07-19 21:59:18,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:59:17" (2/3) ... [2022-07-19 21:59:18,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129c1974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:59:18, skipping insertion in model container [2022-07-19 21:59:18,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:59:18" (3/3) ... [2022-07-19 21:59:18,751 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-07-19 21:59:18,765 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:59:18,765 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:59:18,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:59:18,848 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50819ffd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71e3509a [2022-07-19 21:59:18,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 21:59:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-19 21:59:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 21:59:18,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:18,864 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 21:59:18,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:18,869 INFO L85 PathProgramCache]: Analyzing trace with hash 122195533, now seen corresponding path program 1 times [2022-07-19 21:59:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180062897] [2022-07-19 21:59:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 21:59:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:59:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180062897] [2022-07-19 21:59:19,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180062897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:19,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:19,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:59:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278625723] [2022-07-19 21:59:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:19,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:59:19,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:59:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:59:19,572 INFO L87 Difference]: Start difference. First operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 21:59:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:19,862 INFO L93 Difference]: Finished difference Result 318 states and 453 transitions. [2022-07-19 21:59:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:59:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-19 21:59:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:19,875 INFO L225 Difference]: With dead ends: 318 [2022-07-19 21:59:19,875 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 21:59:19,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:59:19,881 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 90 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:19,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 232 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 21:59:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 21:59:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2022-07-19 21:59:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 98 states have internal predecessors, (120), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-19 21:59:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2022-07-19 21:59:19,959 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 48 [2022-07-19 21:59:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:19,960 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2022-07-19 21:59:19,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 21:59:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2022-07-19 21:59:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 21:59:19,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:19,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:59:19,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1409458321, now seen corresponding path program 1 times [2022-07-19 21:59:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011125994] [2022-07-19 21:59:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 21:59:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:59:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011125994] [2022-07-19 21:59:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011125994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:20,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:20,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:59:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570324431] [2022-07-19 21:59:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:20,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:59:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:59:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:20,305 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 21:59:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:21,006 INFO L93 Difference]: Finished difference Result 323 states and 440 transitions. [2022-07-19 21:59:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:59:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-07-19 21:59:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:21,013 INFO L225 Difference]: With dead ends: 323 [2022-07-19 21:59:21,013 INFO L226 Difference]: Without dead ends: 193 [2022-07-19 21:59:21,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:59:21,022 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 311 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:21,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 327 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 21:59:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-19 21:59:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2022-07-19 21:59:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2022-07-19 21:59:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2022-07-19 21:59:21,060 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 50 [2022-07-19 21:59:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:21,060 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2022-07-19 21:59:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 21:59:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2022-07-19 21:59:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 21:59:21,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:21,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:21,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:59:21,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -564986084, now seen corresponding path program 1 times [2022-07-19 21:59:21,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890940925] [2022-07-19 21:59:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:21,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:59:21,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890940925] [2022-07-19 21:59:21,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890940925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:21,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:21,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:59:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028086875] [2022-07-19 21:59:21,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:21,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:59:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:59:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:59:21,335 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 21:59:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:22,043 INFO L93 Difference]: Finished difference Result 261 states and 346 transitions. [2022-07-19 21:59:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:59:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2022-07-19 21:59:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:22,045 INFO L225 Difference]: With dead ends: 261 [2022-07-19 21:59:22,045 INFO L226 Difference]: Without dead ends: 203 [2022-07-19 21:59:22,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:59:22,047 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:22,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 533 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 21:59:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-19 21:59:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2022-07-19 21:59:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 104 states have internal predecessors, (125), 37 states have call successors, (37), 11 states have call predecessors, (37), 13 states have return successors, (41), 37 states have call predecessors, (41), 36 states have call successors, (41) [2022-07-19 21:59:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2022-07-19 21:59:22,063 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 56 [2022-07-19 21:59:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:22,064 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2022-07-19 21:59:22,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 21:59:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2022-07-19 21:59:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 21:59:22,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:22,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:22,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:59:22,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1211897445, now seen corresponding path program 1 times [2022-07-19 21:59:22,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:22,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775790780] [2022-07-19 21:59:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 21:59:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 21:59:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 21:59:22,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775790780] [2022-07-19 21:59:22,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775790780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047683120] [2022-07-19 21:59:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:22,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:22,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:59:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:59:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:59:23,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:23,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047683120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:23,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:23,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-19 21:59:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399934082] [2022-07-19 21:59:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:23,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:59:23,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:59:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:59:23,079 INFO L87 Difference]: Start difference. First operand 153 states and 203 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 21:59:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:23,326 INFO L93 Difference]: Finished difference Result 280 states and 370 transitions. [2022-07-19 21:59:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:59:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2022-07-19 21:59:23,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:23,328 INFO L225 Difference]: With dead ends: 280 [2022-07-19 21:59:23,328 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 21:59:23,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:59:23,330 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 258 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:23,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 621 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 21:59:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 21:59:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-19 21:59:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-07-19 21:59:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2022-07-19 21:59:23,347 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 63 [2022-07-19 21:59:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:23,348 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2022-07-19 21:59:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 21:59:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2022-07-19 21:59:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 21:59:23,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:23,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:59:23,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:23,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:23,574 INFO L85 PathProgramCache]: Analyzing trace with hash -747455974, now seen corresponding path program 1 times [2022-07-19 21:59:23,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:23,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590719114] [2022-07-19 21:59:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:23,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 21:59:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 21:59:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:23,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590719114] [2022-07-19 21:59:23,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590719114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:23,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:23,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 21:59:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670072083] [2022-07-19 21:59:23,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:59:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:59:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:59:23,993 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:24,884 INFO L93 Difference]: Finished difference Result 212 states and 286 transitions. [2022-07-19 21:59:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:59:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2022-07-19 21:59:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:24,887 INFO L225 Difference]: With dead ends: 212 [2022-07-19 21:59:24,887 INFO L226 Difference]: Without dead ends: 210 [2022-07-19 21:59:24,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:59:24,888 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 298 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:24,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 693 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 21:59:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-19 21:59:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2022-07-19 21:59:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-19 21:59:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-07-19 21:59:24,904 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 68 [2022-07-19 21:59:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:24,905 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-07-19 21:59:24,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-07-19 21:59:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 21:59:24,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:24,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:24,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:59:24,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2108361110, now seen corresponding path program 1 times [2022-07-19 21:59:24,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:24,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979740586] [2022-07-19 21:59:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 21:59:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 21:59:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 21:59:25,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:25,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979740586] [2022-07-19 21:59:25,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979740586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:25,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:25,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:59:25,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971258367] [2022-07-19 21:59:25,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:25,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:59:25,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:59:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:59:25,153 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:25,869 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-07-19 21:59:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:59:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-07-19 21:59:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:25,872 INFO L225 Difference]: With dead ends: 281 [2022-07-19 21:59:25,872 INFO L226 Difference]: Without dead ends: 217 [2022-07-19 21:59:25,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:59:25,873 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:25,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 571 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 21:59:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-19 21:59:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 159. [2022-07-19 21:59:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-19 21:59:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-07-19 21:59:25,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 70 [2022-07-19 21:59:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:25,888 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-07-19 21:59:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-07-19 21:59:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 21:59:25,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:25,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:25,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:59:25,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -856300446, now seen corresponding path program 1 times [2022-07-19 21:59:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319233828] [2022-07-19 21:59:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:25,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 21:59:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:59:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319233828] [2022-07-19 21:59:26,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319233828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:26,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:26,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:59:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170023050] [2022-07-19 21:59:26,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:59:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:59:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:26,179 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:26,878 INFO L93 Difference]: Finished difference Result 377 states and 539 transitions. [2022-07-19 21:59:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:59:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 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 72 [2022-07-19 21:59:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:26,880 INFO L225 Difference]: With dead ends: 377 [2022-07-19 21:59:26,880 INFO L226 Difference]: Without dead ends: 234 [2022-07-19 21:59:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:59:26,882 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 377 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:26,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 367 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 21:59:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-19 21:59:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 164. [2022-07-19 21:59:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-19 21:59:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 217 transitions. [2022-07-19 21:59:26,896 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 217 transitions. Word has length 72 [2022-07-19 21:59:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 217 transitions. [2022-07-19 21:59:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 217 transitions. [2022-07-19 21:59:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 21:59:26,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:26,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:59:26,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash -598135008, now seen corresponding path program 1 times [2022-07-19 21:59:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:26,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056211558] [2022-07-19 21:59:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 21:59:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:59:27,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056211558] [2022-07-19 21:59:27,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056211558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367005336] [2022-07-19 21:59:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:27,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:27,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:27,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:27,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:59:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 21:59:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:27,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 21:59:28,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:59:28,240 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-19 21:59:28,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-19 21:59:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:59:28,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:28,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367005336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:28,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:28,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 18 [2022-07-19 21:59:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683150492] [2022-07-19 21:59:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:59:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:59:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:59:28,246 INFO L87 Difference]: Start difference. First operand 164 states and 217 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 21:59:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:28,358 INFO L93 Difference]: Finished difference Result 335 states and 441 transitions. [2022-07-19 21:59:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:59:28,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-07-19 21:59:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:28,360 INFO L225 Difference]: With dead ends: 335 [2022-07-19 21:59:28,360 INFO L226 Difference]: Without dead ends: 183 [2022-07-19 21:59:28,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:59:28,361 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:28,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1337 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-07-19 21:59:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-19 21:59:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-07-19 21:59:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 131 states have internal predecessors, (158), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-19 21:59:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2022-07-19 21:59:28,373 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 72 [2022-07-19 21:59:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:28,374 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2022-07-19 21:59:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 21:59:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2022-07-19 21:59:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 21:59:28,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:28,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:28,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:28,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 21:59:28,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -951223390, now seen corresponding path program 1 times [2022-07-19 21:59:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:28,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816142987] [2022-07-19 21:59:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:28,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 21:59:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 21:59:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:59:28,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816142987] [2022-07-19 21:59:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816142987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967848662] [2022-07-19 21:59:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:28,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:28,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:28,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:59:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:59:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:59:29,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967848662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:29,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:29,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-19 21:59:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941101177] [2022-07-19 21:59:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:59:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:59:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:59:29,286 INFO L87 Difference]: Start difference. First operand 183 states and 240 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) [2022-07-19 21:59:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:29,318 INFO L93 Difference]: Finished difference Result 344 states and 460 transitions. [2022-07-19 21:59:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:59:29,319 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 72 [2022-07-19 21:59:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:29,320 INFO L225 Difference]: With dead ends: 344 [2022-07-19 21:59:29,320 INFO L226 Difference]: Without dead ends: 192 [2022-07-19 21:59:29,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:29,322 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:29,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 568 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 21:59:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-19 21:59:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2022-07-19 21:59:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.221311475409836) internal successors, (149), 123 states have internal predecessors, (149), 38 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (43), 38 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-19 21:59:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2022-07-19 21:59:29,334 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 72 [2022-07-19 21:59:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2022-07-19 21:59:29,334 INFO L496 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) [2022-07-19 21:59:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2022-07-19 21:59:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 21:59:29,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:29,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:29,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:29,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:29,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -188012506, now seen corresponding path program 1 times [2022-07-19 21:59:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294296173] [2022-07-19 21:59:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 21:59:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 21:59:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 21:59:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 21:59:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294296173] [2022-07-19 21:59:29,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294296173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646572295] [2022-07-19 21:59:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:29,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:29,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:29,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:29,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:59:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:59:30,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:59:30,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:30,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646572295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:30,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:30,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2022-07-19 21:59:30,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715311204] [2022-07-19 21:59:30,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:30,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:59:30,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:59:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:59:30,432 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 21:59:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:30,575 INFO L93 Difference]: Finished difference Result 332 states and 439 transitions. [2022-07-19 21:59:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:59:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2022-07-19 21:59:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:30,577 INFO L225 Difference]: With dead ends: 332 [2022-07-19 21:59:30,578 INFO L226 Difference]: Without dead ends: 180 [2022-07-19 21:59:30,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:59:30,579 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:30,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1431 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 21:59:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-19 21:59:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-19 21:59:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-19 21:59:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2022-07-19 21:59:30,593 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 76 [2022-07-19 21:59:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:30,594 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2022-07-19 21:59:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 21:59:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2022-07-19 21:59:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:30,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:30,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:30,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:30,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:30,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 908856363, now seen corresponding path program 1 times [2022-07-19 21:59:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:30,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822978468] [2022-07-19 21:59:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 21:59:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822978468] [2022-07-19 21:59:31,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822978468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252527240] [2022-07-19 21:59:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:31,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:31,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:59:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:59:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:59:31,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:31,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252527240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:31,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:31,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-19 21:59:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792487467] [2022-07-19 21:59:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:59:31,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:59:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:59:31,432 INFO L87 Difference]: Start difference. First operand 180 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 21:59:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:31,459 INFO L93 Difference]: Finished difference Result 342 states and 461 transitions. [2022-07-19 21:59:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:59:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 78 [2022-07-19 21:59:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:31,461 INFO L225 Difference]: With dead ends: 342 [2022-07-19 21:59:31,461 INFO L226 Difference]: Without dead ends: 183 [2022-07-19 21:59:31,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:31,462 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:31,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 561 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 21:59:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-19 21:59:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-19 21:59:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 128 states have internal predecessors, (151), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-19 21:59:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 237 transitions. [2022-07-19 21:59:31,473 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 237 transitions. Word has length 78 [2022-07-19 21:59:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:31,473 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 237 transitions. [2022-07-19 21:59:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 21:59:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 237 transitions. [2022-07-19 21:59:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:31,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:31,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:31,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:31,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 21:59:31,704 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1518245265, now seen corresponding path program 1 times [2022-07-19 21:59:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:31,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672121637] [2022-07-19 21:59:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 21:59:31,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672121637] [2022-07-19 21:59:31,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672121637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565701551] [2022-07-19 21:59:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:31,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:31,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:59:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:59:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:59:32,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:59:32,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565701551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:32,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:59:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-19 21:59:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493289007] [2022-07-19 21:59:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:59:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:59:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:59:32,332 INFO L87 Difference]: Start difference. First operand 180 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 21:59:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:32,357 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2022-07-19 21:59:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:59:32,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 78 [2022-07-19 21:59:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:32,359 INFO L225 Difference]: With dead ends: 348 [2022-07-19 21:59:32,359 INFO L226 Difference]: Without dead ends: 189 [2022-07-19 21:59:32,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:32,361 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 34 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:32,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 21:59:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-19 21:59:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2022-07-19 21:59:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 122 states have (on average 1.180327868852459) internal successors, (144), 124 states have internal predecessors, (144), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-19 21:59:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2022-07-19 21:59:32,371 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 78 [2022-07-19 21:59:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:32,371 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2022-07-19 21:59:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 21:59:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2022-07-19 21:59:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:32,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:32,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:32,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:32,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1074344591, now seen corresponding path program 1 times [2022-07-19 21:59:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255845089] [2022-07-19 21:59:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:59:33,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255845089] [2022-07-19 21:59:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255845089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228404642] [2022-07-19 21:59:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:33,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:33,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:33,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:33,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:59:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 21:59:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:34,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 21:59:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:59:34,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:59:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228404642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:34,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:59:34,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-07-19 21:59:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976977987] [2022-07-19 21:59:34,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:59:34,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:59:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:59:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-07-19 21:59:34,918 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 21:59:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:37,352 INFO L93 Difference]: Finished difference Result 366 states and 491 transitions. [2022-07-19 21:59:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:59:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2022-07-19 21:59:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:37,358 INFO L225 Difference]: With dead ends: 366 [2022-07-19 21:59:37,358 INFO L226 Difference]: Without dead ends: 316 [2022-07-19 21:59:37,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=1699, Unknown=2, NotChecked=0, Total=2070 [2022-07-19 21:59:37,359 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 424 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:37,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1200 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2319 Invalid, 0 Unknown, 963 Unchecked, 1.8s Time] [2022-07-19 21:59:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-19 21:59:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 228. [2022-07-19 21:59:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 45 states have call successors, (45), 15 states have call predecessors, (45), 20 states have return successors, (60), 47 states have call predecessors, (60), 44 states have call successors, (60) [2022-07-19 21:59:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2022-07-19 21:59:37,375 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 78 [2022-07-19 21:59:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:37,376 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2022-07-19 21:59:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 21:59:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2022-07-19 21:59:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:37,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:37,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:37,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:37,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:37,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 94245687, now seen corresponding path program 1 times [2022-07-19 21:59:37,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:37,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731070697] [2022-07-19 21:59:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:37,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 21:59:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731070697] [2022-07-19 21:59:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731070697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173027440] [2022-07-19 21:59:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:38,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:38,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:38,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:59:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 21:59:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:38,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:59:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:59:39,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:59:42,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173027440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:42,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:59:42,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-19 21:59:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98843726] [2022-07-19 21:59:42,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:59:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:59:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:59:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:59:42,750 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-19 21:59:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:46,139 INFO L93 Difference]: Finished difference Result 418 states and 588 transitions. [2022-07-19 21:59:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 21:59:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 78 [2022-07-19 21:59:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:46,142 INFO L225 Difference]: With dead ends: 418 [2022-07-19 21:59:46,142 INFO L226 Difference]: Without dead ends: 386 [2022-07-19 21:59:46,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=541, Invalid=2647, Unknown=4, NotChecked=0, Total=3192 [2022-07-19 21:59:46,144 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 478 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1236 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:46,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1237 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2861 Invalid, 0 Unknown, 1236 Unchecked, 2.3s Time] [2022-07-19 21:59:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-19 21:59:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 269. [2022-07-19 21:59:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 197 states have internal predecessors, (224), 51 states have call successors, (51), 17 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2022-07-19 21:59:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2022-07-19 21:59:46,173 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 78 [2022-07-19 21:59:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:46,173 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2022-07-19 21:59:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-19 21:59:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2022-07-19 21:59:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:46,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:46,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:46,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:59:46,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 352411125, now seen corresponding path program 1 times [2022-07-19 21:59:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680970382] [2022-07-19 21:59:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:59:46,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680970382] [2022-07-19 21:59:46,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680970382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:46,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:46,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:59:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016771969] [2022-07-19 21:59:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:59:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:59:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:59:46,664 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:47,322 INFO L93 Difference]: Finished difference Result 549 states and 769 transitions. [2022-07-19 21:59:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:59:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 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 78 [2022-07-19 21:59:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:47,325 INFO L225 Difference]: With dead ends: 549 [2022-07-19 21:59:47,325 INFO L226 Difference]: Without dead ends: 320 [2022-07-19 21:59:47,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:59:47,327 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:47,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 369 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 21:59:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-19 21:59:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 267. [2022-07-19 21:59:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 192 states have (on average 1.140625) internal successors, (219), 195 states have internal predecessors, (219), 51 states have call successors, (51), 17 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2022-07-19 21:59:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 347 transitions. [2022-07-19 21:59:47,357 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 347 transitions. Word has length 78 [2022-07-19 21:59:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:47,357 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 347 transitions. [2022-07-19 21:59:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 347 transitions. [2022-07-19 21:59:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 21:59:47,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:47,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:47,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:59:47,359 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash -258842695, now seen corresponding path program 1 times [2022-07-19 21:59:47,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:47,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728510246] [2022-07-19 21:59:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:47,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:47,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:47,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:59:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:48,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728510246] [2022-07-19 21:59:48,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728510246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:48,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287937312] [2022-07-19 21:59:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:48,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:59:48,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:59:48,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:59:48,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:59:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 21:59:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:59:48,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 21:59:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:59:49,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:59:50,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287937312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:59:50,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:59:50,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2022-07-19 21:59:50,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453719363] [2022-07-19 21:59:50,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:59:50,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 21:59:50,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 21:59:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:59:50,635 INFO L87 Difference]: Start difference. First operand 267 states and 347 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 21:59:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:53,478 INFO L93 Difference]: Finished difference Result 387 states and 531 transitions. [2022-07-19 21:59:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:59:53,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2022-07-19 21:59:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:53,482 INFO L225 Difference]: With dead ends: 387 [2022-07-19 21:59:53,482 INFO L226 Difference]: Without dead ends: 355 [2022-07-19 21:59:53,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 21:59:53,484 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 473 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:53,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 914 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1409 Invalid, 0 Unknown, 639 Unchecked, 1.4s Time] [2022-07-19 21:59:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-19 21:59:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 291. [2022-07-19 21:59:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-19 21:59:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-19 21:59:53,505 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 78 [2022-07-19 21:59:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:53,506 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-19 21:59:53,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 21:59:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-19 21:59:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 21:59:53,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:53,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:53,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:59:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:59:53,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash 394720380, now seen corresponding path program 1 times [2022-07-19 21:59:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218943379] [2022-07-19 21:59:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 21:59:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218943379] [2022-07-19 21:59:54,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218943379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:54,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:54,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:59:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781296988] [2022-07-19 21:59:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:59:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:59:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:59:54,019 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:54,996 INFO L93 Difference]: Finished difference Result 347 states and 471 transitions. [2022-07-19 21:59:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:59:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 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 80 [2022-07-19 21:59:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:54,999 INFO L225 Difference]: With dead ends: 347 [2022-07-19 21:59:54,999 INFO L226 Difference]: Without dead ends: 345 [2022-07-19 21:59:54,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:59:55,000 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 145 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:55,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 872 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 21:59:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-19 21:59:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 291. [2022-07-19 21:59:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-19 21:59:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-19 21:59:55,022 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 80 [2022-07-19 21:59:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:55,023 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-19 21:59:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 21:59:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-19 21:59:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 21:59:55,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:55,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:55,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:59:55,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1080266240, now seen corresponding path program 1 times [2022-07-19 21:59:55,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:55,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459170234] [2022-07-19 21:59:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:55,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:59:55,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459170234] [2022-07-19 21:59:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459170234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:55,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:55,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-19 21:59:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003739147] [2022-07-19 21:59:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:55,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:59:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:59:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:59:55,724 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 21:59:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:57,547 INFO L93 Difference]: Finished difference Result 366 states and 496 transitions. [2022-07-19 21:59:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:59:57,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2022-07-19 21:59:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:57,550 INFO L225 Difference]: With dead ends: 366 [2022-07-19 21:59:57,550 INFO L226 Difference]: Without dead ends: 364 [2022-07-19 21:59:57,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:59:57,551 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 372 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:57,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 882 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 21:59:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-19 21:59:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 291. [2022-07-19 21:59:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-19 21:59:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-19 21:59:57,573 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 80 [2022-07-19 21:59:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:57,574 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-19 21:59:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 21:59:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-19 21:59:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 21:59:57,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:57,575 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-19 21:59:57,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:59:57,576 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash -650434166, now seen corresponding path program 1 times [2022-07-19 21:59:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80186887] [2022-07-19 21:59:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:57,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 21:59:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 21:59:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 21:59:57,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80186887] [2022-07-19 21:59:57,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80186887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:57,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:57,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:59:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290528103] [2022-07-19 21:59:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:57,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:59:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:59:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:59:57,787 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 21:59:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:58,322 INFO L93 Difference]: Finished difference Result 330 states and 435 transitions. [2022-07-19 21:59:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:59:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 81 [2022-07-19 21:59:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:58,325 INFO L225 Difference]: With dead ends: 330 [2022-07-19 21:59:58,325 INFO L226 Difference]: Without dead ends: 328 [2022-07-19 21:59:58,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:59:58,326 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 112 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:58,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 874 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 21:59:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-19 21:59:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 296. [2022-07-19 21:59:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 215 states have (on average 1.130232558139535) internal successors, (243), 221 states have internal predecessors, (243), 54 states have call successors, (54), 19 states have call predecessors, (54), 26 states have return successors, (82), 55 states have call predecessors, (82), 53 states have call successors, (82) [2022-07-19 21:59:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 379 transitions. [2022-07-19 21:59:58,353 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 379 transitions. Word has length 81 [2022-07-19 21:59:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:58,353 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 379 transitions. [2022-07-19 21:59:58,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-19 21:59:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 379 transitions. [2022-07-19 21:59:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 21:59:58,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:58,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:59:58,354 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash -306040688, now seen corresponding path program 1 times [2022-07-19 21:59:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:58,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773977807] [2022-07-19 21:59:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:59:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 21:59:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:59:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 21:59:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 21:59:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 21:59:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:59:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 21:59:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 21:59:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:59:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:59:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:59:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773977807] [2022-07-19 21:59:58,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773977807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:59:58,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:59:58,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 21:59:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615006150] [2022-07-19 21:59:58,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:59:58,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:59:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:59:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:59:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:59:58,794 INFO L87 Difference]: Start difference. First operand 296 states and 379 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 21:59:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:59:59,709 INFO L93 Difference]: Finished difference Result 365 states and 495 transitions. [2022-07-19 21:59:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:59:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2022-07-19 21:59:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:59:59,711 INFO L225 Difference]: With dead ends: 365 [2022-07-19 21:59:59,712 INFO L226 Difference]: Without dead ends: 363 [2022-07-19 21:59:59,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:59:59,713 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 302 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 21:59:59,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 485 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 21:59:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-19 21:59:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 304. [2022-07-19 21:59:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 219 states have (on average 1.1278538812785388) internal successors, (247), 225 states have internal predecessors, (247), 57 states have call successors, (57), 20 states have call predecessors, (57), 27 states have return successors, (85), 58 states have call predecessors, (85), 56 states have call successors, (85) [2022-07-19 21:59:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 389 transitions. [2022-07-19 21:59:59,737 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 389 transitions. Word has length 86 [2022-07-19 21:59:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:59:59,737 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 389 transitions. [2022-07-19 21:59:59,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 21:59:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 389 transitions. [2022-07-19 21:59:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 21:59:59,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:59:59,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:59:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:59:59,739 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:59:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:59:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash 748766864, now seen corresponding path program 1 times [2022-07-19 21:59:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:59:59,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410908327] [2022-07-19 21:59:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:59:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:59:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:00:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 22:00:00,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:00,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410908327] [2022-07-19 22:00:00,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410908327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:00,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905605667] [2022-07-19 22:00:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:00,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 22:00:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 22:00:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:00,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 22:00:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:00:01,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:00:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905605667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:01,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 34 [2022-07-19 22:00:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630486597] [2022-07-19 22:00:01,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 22:00:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 22:00:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 22:00:01,861 INFO L87 Difference]: Start difference. First operand 304 states and 389 transitions. Second operand has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-19 22:00:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:05,052 INFO L93 Difference]: Finished difference Result 708 states and 947 transitions. [2022-07-19 22:00:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 22:00:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 85 [2022-07-19 22:00:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:05,055 INFO L225 Difference]: With dead ends: 708 [2022-07-19 22:00:05,055 INFO L226 Difference]: Without dead ends: 444 [2022-07-19 22:00:05,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 159 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=456, Invalid=3704, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 22:00:05,058 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 433 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 2407 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3344 Invalid, 0 Unknown, 304 Unchecked, 2.1s Time] [2022-07-19 22:00:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-19 22:00:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 330. [2022-07-19 22:00:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 242 states have (on average 1.128099173553719) internal successors, (273), 250 states have internal predecessors, (273), 57 states have call successors, (57), 21 states have call predecessors, (57), 30 states have return successors, (89), 58 states have call predecessors, (89), 56 states have call successors, (89) [2022-07-19 22:00:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 419 transitions. [2022-07-19 22:00:05,087 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 419 transitions. Word has length 85 [2022-07-19 22:00:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:05,087 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 419 transitions. [2022-07-19 22:00:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-19 22:00:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 419 transitions. [2022-07-19 22:00:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 22:00:05,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:05,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:05,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:05,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-19 22:00:05,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1622871588, now seen corresponding path program 1 times [2022-07-19 22:00:05,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:05,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199272193] [2022-07-19 22:00:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 22:00:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 22:00:05,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199272193] [2022-07-19 22:00:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199272193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969215488] [2022-07-19 22:00:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:05,504 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 22:00:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 22:00:05,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:06,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:00:06,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:00:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:00:06,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 22:00:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:00:06,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 22:00:06,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 22:00:06,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 22:00:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 22:00:06,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:00:06,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969215488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:06,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:00:06,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2022-07-19 22:00:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876077652] [2022-07-19 22:00:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:06,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:00:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:00:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:00:06,437 INFO L87 Difference]: Start difference. First operand 330 states and 419 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:00:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:06,639 INFO L93 Difference]: Finished difference Result 689 states and 883 transitions. [2022-07-19 22:00:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 22:00:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 89 [2022-07-19 22:00:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:06,644 INFO L225 Difference]: With dead ends: 689 [2022-07-19 22:00:06,644 INFO L226 Difference]: Without dead ends: 421 [2022-07-19 22:00:06,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:00:06,646 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 29 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:06,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1028 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-19 22:00:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-19 22:00:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 371. [2022-07-19 22:00:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 274 states have (on average 1.1167883211678833) internal successors, (306), 282 states have internal predecessors, (306), 62 states have call successors, (62), 26 states have call predecessors, (62), 34 states have return successors, (95), 62 states have call predecessors, (95), 61 states have call successors, (95) [2022-07-19 22:00:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 463 transitions. [2022-07-19 22:00:06,676 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 463 transitions. Word has length 89 [2022-07-19 22:00:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:06,677 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 463 transitions. [2022-07-19 22:00:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:00:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 463 transitions. [2022-07-19 22:00:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 22:00:06,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:06,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:06,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:06,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 22:00:06,895 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1189142502, now seen corresponding path program 1 times [2022-07-19 22:00:06,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564761522] [2022-07-19 22:00:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:06,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 22:00:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 22:00:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564761522] [2022-07-19 22:00:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564761522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89515200] [2022-07-19 22:00:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:07,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:07,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:07,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 22:00:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:07,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 22:00:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 22:00:07,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:00:07,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89515200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:07,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:00:07,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2022-07-19 22:00:07,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014045468] [2022-07-19 22:00:07,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:07,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:00:07,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:00:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:00:07,628 INFO L87 Difference]: Start difference. First operand 371 states and 463 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:00:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:07,700 INFO L93 Difference]: Finished difference Result 659 states and 827 transitions. [2022-07-19 22:00:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:00:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-19 22:00:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:07,702 INFO L225 Difference]: With dead ends: 659 [2022-07-19 22:00:07,702 INFO L226 Difference]: Without dead ends: 372 [2022-07-19 22:00:07,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:00:07,704 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 10 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:07,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:00:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-19 22:00:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-07-19 22:00:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 275 states have (on average 1.1163636363636364) internal successors, (307), 282 states have internal predecessors, (307), 62 states have call successors, (62), 26 states have call predecessors, (62), 34 states have return successors, (95), 63 states have call predecessors, (95), 61 states have call successors, (95) [2022-07-19 22:00:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 464 transitions. [2022-07-19 22:00:07,732 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 464 transitions. Word has length 89 [2022-07-19 22:00:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:07,732 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 464 transitions. [2022-07-19 22:00:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:00:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 464 transitions. [2022-07-19 22:00:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-19 22:00:07,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:07,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:07,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 22:00:07,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 119789218, now seen corresponding path program 1 times [2022-07-19 22:00:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912748869] [2022-07-19 22:00:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:00:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:00:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:00:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:00:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:00:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912748869] [2022-07-19 22:00:08,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912748869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:08,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:08,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 22:00:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285062196] [2022-07-19 22:00:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:00:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:00:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:00:08,222 INFO L87 Difference]: Start difference. First operand 372 states and 464 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 22:00:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:09,151 INFO L93 Difference]: Finished difference Result 437 states and 579 transitions. [2022-07-19 22:00:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 22:00:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-07-19 22:00:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:09,154 INFO L225 Difference]: With dead ends: 437 [2022-07-19 22:00:09,154 INFO L226 Difference]: Without dead ends: 435 [2022-07-19 22:00:09,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:00:09,155 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 157 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:09,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 510 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 22:00:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-19 22:00:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 394. [2022-07-19 22:00:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 290 states have (on average 1.1172413793103448) internal successors, (324), 298 states have internal predecessors, (324), 66 states have call successors, (66), 27 states have call predecessors, (66), 37 states have return successors, (106), 68 states have call predecessors, (106), 65 states have call successors, (106) [2022-07-19 22:00:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2022-07-19 22:00:09,190 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 92 [2022-07-19 22:00:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:09,190 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2022-07-19 22:00:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 22:00:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2022-07-19 22:00:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:00:09,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:09,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2022-07-19 22:00:09,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 22:00:09,192 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1126537668, now seen corresponding path program 1 times [2022-07-19 22:00:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:09,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439791911] [2022-07-19 22:00:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 22:00:09,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:09,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439791911] [2022-07-19 22:00:09,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439791911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:09,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553939553] [2022-07-19 22:00:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:09,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:09,548 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) [2022-07-19 22:00:09,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 22:00:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 22:00:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:09,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:00:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:00:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:00:11,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553939553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:11,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:11,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 37 [2022-07-19 22:00:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116200330] [2022-07-19 22:00:11,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:11,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 22:00:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 22:00:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 22:00:11,748 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-07-19 22:00:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:17,388 INFO L93 Difference]: Finished difference Result 757 states and 1005 transitions. [2022-07-19 22:00:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 22:00:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 96 [2022-07-19 22:00:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:17,392 INFO L225 Difference]: With dead ends: 757 [2022-07-19 22:00:17,393 INFO L226 Difference]: Without dead ends: 633 [2022-07-19 22:00:17,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 185 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2022-07-19 22:00:17,395 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 345 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 5069 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:17,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 3453 Invalid, 5805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5069 Invalid, 0 Unknown, 583 Unchecked, 4.3s Time] [2022-07-19 22:00:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-07-19 22:00:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 484. [2022-07-19 22:00:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 352 states have (on average 1.1392045454545454) internal successors, (401), 365 states have internal predecessors, (401), 86 states have call successors, (86), 29 states have call predecessors, (86), 45 states have return successors, (152), 89 states have call predecessors, (152), 85 states have call successors, (152) [2022-07-19 22:00:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 639 transitions. [2022-07-19 22:00:17,443 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 639 transitions. Word has length 96 [2022-07-19 22:00:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:17,443 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 639 transitions. [2022-07-19 22:00:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-07-19 22:00:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 639 transitions. [2022-07-19 22:00:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 22:00:17,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:17,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-19 22:00:17,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 22:00:17,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 22:00:17,660 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1329458343, now seen corresponding path program 1 times [2022-07-19 22:00:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963158884] [2022-07-19 22:00:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:17,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 22:00:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 22:00:18,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963158884] [2022-07-19 22:00:18,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963158884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:18,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:18,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 22:00:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949678149] [2022-07-19 22:00:18,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:00:18,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:00:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:00:18,155 INFO L87 Difference]: Start difference. First operand 484 states and 639 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:00:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:18,980 INFO L93 Difference]: Finished difference Result 843 states and 1120 transitions. [2022-07-19 22:00:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:00:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2022-07-19 22:00:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:18,984 INFO L225 Difference]: With dead ends: 843 [2022-07-19 22:00:18,984 INFO L226 Difference]: Without dead ends: 531 [2022-07-19 22:00:18,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:00:18,986 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 132 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:18,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 683 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 22:00:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-19 22:00:19,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 509. [2022-07-19 22:00:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 366 states have (on average 1.1366120218579234) internal successors, (416), 380 states have internal predecessors, (416), 94 states have call successors, (94), 30 states have call predecessors, (94), 48 states have return successors, (169), 98 states have call predecessors, (169), 93 states have call successors, (169) [2022-07-19 22:00:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 679 transitions. [2022-07-19 22:00:19,038 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 679 transitions. Word has length 91 [2022-07-19 22:00:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:19,038 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 679 transitions. [2022-07-19 22:00:19,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:00:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 679 transitions. [2022-07-19 22:00:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:00:19,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:19,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2022-07-19 22:00:19,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 22:00:19,040 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash -223113860, now seen corresponding path program 1 times [2022-07-19 22:00:19,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177308824] [2022-07-19 22:00:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:19,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:00:19,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177308824] [2022-07-19 22:00:19,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177308824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117775039] [2022-07-19 22:00:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:19,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:19,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:19,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 22:00:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-19 22:00:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:20,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:00:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:00:21,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:00:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117775039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:21,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 11] total 36 [2022-07-19 22:00:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64278480] [2022-07-19 22:00:21,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 22:00:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 22:00:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 22:00:21,833 INFO L87 Difference]: Start difference. First operand 509 states and 679 transitions. Second operand has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-19 22:00:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:24,983 INFO L93 Difference]: Finished difference Result 748 states and 959 transitions. [2022-07-19 22:00:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 22:00:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 96 [2022-07-19 22:00:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:24,986 INFO L225 Difference]: With dead ends: 748 [2022-07-19 22:00:24,986 INFO L226 Difference]: Without dead ends: 616 [2022-07-19 22:00:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 22:00:24,988 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 527 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:24,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1493 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2635 Invalid, 0 Unknown, 520 Unchecked, 2.2s Time] [2022-07-19 22:00:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-07-19 22:00:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 506. [2022-07-19 22:00:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 365 states have (on average 1.1342465753424658) internal successors, (414), 377 states have internal predecessors, (414), 94 states have call successors, (94), 30 states have call predecessors, (94), 46 states have return successors, (156), 98 states have call predecessors, (156), 93 states have call successors, (156) [2022-07-19 22:00:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 664 transitions. [2022-07-19 22:00:25,046 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 664 transitions. Word has length 96 [2022-07-19 22:00:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:25,046 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 664 transitions. [2022-07-19 22:00:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-19 22:00:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 664 transitions. [2022-07-19 22:00:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 22:00:25,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:25,049 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:25,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:25,264 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1572301202, now seen corresponding path program 1 times [2022-07-19 22:00:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:25,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406765271] [2022-07-19 22:00:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:00:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:00:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:00:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:00:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 22:00:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 22:00:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:25,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406765271] [2022-07-19 22:00:25,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406765271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:25,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:25,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 22:00:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799050438] [2022-07-19 22:00:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:25,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:00:25,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:00:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:00:25,692 INFO L87 Difference]: Start difference. First operand 506 states and 664 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 22:00:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:26,575 INFO L93 Difference]: Finished difference Result 543 states and 726 transitions. [2022-07-19 22:00:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:00:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2022-07-19 22:00:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:26,578 INFO L225 Difference]: With dead ends: 543 [2022-07-19 22:00:26,579 INFO L226 Difference]: Without dead ends: 541 [2022-07-19 22:00:26,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:00:26,580 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 236 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:26,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 488 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 22:00:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-07-19 22:00:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 513. [2022-07-19 22:00:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 370 states have (on average 1.1324324324324324) internal successors, (419), 382 states have internal predecessors, (419), 95 states have call successors, (95), 31 states have call predecessors, (95), 47 states have return successors, (157), 99 states have call predecessors, (157), 94 states have call successors, (157) [2022-07-19 22:00:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 671 transitions. [2022-07-19 22:00:26,638 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 671 transitions. Word has length 99 [2022-07-19 22:00:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:26,638 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 671 transitions. [2022-07-19 22:00:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 22:00:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 671 transitions. [2022-07-19 22:00:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 22:00:26,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:26,640 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 22:00:26,641 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1103427007, now seen corresponding path program 1 times [2022-07-19 22:00:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437745964] [2022-07-19 22:00:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:00:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:26,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437745964] [2022-07-19 22:00:26,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437745964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:26,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:26,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 22:00:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760260936] [2022-07-19 22:00:26,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:26,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:00:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:00:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:00:26,885 INFO L87 Difference]: Start difference. First operand 513 states and 671 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 22:00:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:27,498 INFO L93 Difference]: Finished difference Result 523 states and 682 transitions. [2022-07-19 22:00:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 22:00:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 98 [2022-07-19 22:00:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:27,501 INFO L225 Difference]: With dead ends: 523 [2022-07-19 22:00:27,501 INFO L226 Difference]: Without dead ends: 521 [2022-07-19 22:00:27,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-19 22:00:27,502 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 119 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:27,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1090 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 22:00:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-19 22:00:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2022-07-19 22:00:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 370 states have (on average 1.1324324324324324) internal successors, (419), 382 states have internal predecessors, (419), 95 states have call successors, (95), 31 states have call predecessors, (95), 47 states have return successors, (157), 99 states have call predecessors, (157), 94 states have call successors, (157) [2022-07-19 22:00:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 671 transitions. [2022-07-19 22:00:27,559 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 671 transitions. Word has length 98 [2022-07-19 22:00:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:27,559 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 671 transitions. [2022-07-19 22:00:27,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 22:00:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 671 transitions. [2022-07-19 22:00:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 22:00:27,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:27,561 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:27,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 22:00:27,561 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash -474748987, now seen corresponding path program 1 times [2022-07-19 22:00:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:27,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972068166] [2022-07-19 22:00:27,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:27,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 22:00:27,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972068166] [2022-07-19 22:00:27,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972068166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191158336] [2022-07-19 22:00:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:27,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:27,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:27,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:27,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 22:00:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:28,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 22:00:28,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:00:29,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:29,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-19 22:00:29,320 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 22:00:29,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-07-19 22:00:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:00:29,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191158336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:29,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:29,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 25 [2022-07-19 22:00:29,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340278633] [2022-07-19 22:00:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:29,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 22:00:29,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 22:00:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-07-19 22:00:29,357 INFO L87 Difference]: Start difference. First operand 513 states and 671 transitions. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 22:00:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:31,673 INFO L93 Difference]: Finished difference Result 725 states and 930 transitions. [2022-07-19 22:00:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 22:00:31,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2022-07-19 22:00:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:31,677 INFO L225 Difference]: With dead ends: 725 [2022-07-19 22:00:31,677 INFO L226 Difference]: Without dead ends: 624 [2022-07-19 22:00:31,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 22:00:31,679 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 303 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:31,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1558 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2576 Invalid, 0 Unknown, 418 Unchecked, 1.8s Time] [2022-07-19 22:00:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-07-19 22:00:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 535. [2022-07-19 22:00:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 391 states have (on average 1.1304347826086956) internal successors, (442), 404 states have internal predecessors, (442), 94 states have call successors, (94), 32 states have call predecessors, (94), 49 states have return successors, (155), 98 states have call predecessors, (155), 93 states have call successors, (155) [2022-07-19 22:00:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 691 transitions. [2022-07-19 22:00:31,739 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 691 transitions. Word has length 98 [2022-07-19 22:00:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:31,740 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 691 transitions. [2022-07-19 22:00:31,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 22:00:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 691 transitions. [2022-07-19 22:00:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 22:00:31,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:31,742 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:31,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:31,963 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash 204523267, now seen corresponding path program 1 times [2022-07-19 22:00:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:31,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079345885] [2022-07-19 22:00:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-19 22:00:32,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079345885] [2022-07-19 22:00:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079345885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:32,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:32,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 22:00:32,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847991967] [2022-07-19 22:00:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:32,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 22:00:32,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 22:00:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:00:32,670 INFO L87 Difference]: Start difference. First operand 535 states and 691 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:00:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:34,162 INFO L93 Difference]: Finished difference Result 565 states and 729 transitions. [2022-07-19 22:00:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 22:00:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 98 [2022-07-19 22:00:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:34,165 INFO L225 Difference]: With dead ends: 565 [2022-07-19 22:00:34,165 INFO L226 Difference]: Without dead ends: 563 [2022-07-19 22:00:34,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-07-19 22:00:34,166 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 210 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:34,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1139 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 22:00:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-19 22:00:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 539. [2022-07-19 22:00:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 394 states have (on average 1.1294416243654823) internal successors, (445), 407 states have internal predecessors, (445), 94 states have call successors, (94), 33 states have call predecessors, (94), 50 states have return successors, (155), 98 states have call predecessors, (155), 93 states have call successors, (155) [2022-07-19 22:00:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 694 transitions. [2022-07-19 22:00:34,222 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 694 transitions. Word has length 98 [2022-07-19 22:00:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:34,222 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 694 transitions. [2022-07-19 22:00:34,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:00:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 694 transitions. [2022-07-19 22:00:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 22:00:34,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:34,224 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 22:00:34,224 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 175619793, now seen corresponding path program 1 times [2022-07-19 22:00:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:34,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250890525] [2022-07-19 22:00:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:00:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:00:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-19 22:00:34,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:34,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250890525] [2022-07-19 22:00:34,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250890525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:34,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:34,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:00:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377644042] [2022-07-19 22:00:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:34,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:00:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:00:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:00:34,663 INFO L87 Difference]: Start difference. First operand 539 states and 694 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:00:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:35,873 INFO L93 Difference]: Finished difference Result 703 states and 884 transitions. [2022-07-19 22:00:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 22:00:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2022-07-19 22:00:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:35,876 INFO L225 Difference]: With dead ends: 703 [2022-07-19 22:00:35,876 INFO L226 Difference]: Without dead ends: 557 [2022-07-19 22:00:35,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-19 22:00:35,877 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 277 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:35,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 706 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 22:00:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-07-19 22:00:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 534. [2022-07-19 22:00:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 389 states have (on average 1.1285347043701799) internal successors, (439), 401 states have internal predecessors, (439), 95 states have call successors, (95), 33 states have call predecessors, (95), 49 states have return successors, (151), 99 states have call predecessors, (151), 93 states have call successors, (151) [2022-07-19 22:00:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 685 transitions. [2022-07-19 22:00:35,939 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 685 transitions. Word has length 102 [2022-07-19 22:00:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:35,939 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 685 transitions. [2022-07-19 22:00:35,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:00:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 685 transitions. [2022-07-19 22:00:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 22:00:35,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:35,942 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 22:00:35,942 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2142703970, now seen corresponding path program 1 times [2022-07-19 22:00:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:35,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128630828] [2022-07-19 22:00:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:00:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:00:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:00:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 22:00:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128630828] [2022-07-19 22:00:36,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128630828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:36,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:36,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 22:00:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131106851] [2022-07-19 22:00:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:36,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 22:00:36,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 22:00:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:00:36,785 INFO L87 Difference]: Start difference. First operand 534 states and 685 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:00:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:37,787 INFO L93 Difference]: Finished difference Result 566 states and 734 transitions. [2022-07-19 22:00:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:00:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 108 [2022-07-19 22:00:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:37,790 INFO L225 Difference]: With dead ends: 566 [2022-07-19 22:00:37,790 INFO L226 Difference]: Without dead ends: 564 [2022-07-19 22:00:37,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:00:37,791 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:37,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 642 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 22:00:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-19 22:00:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 538. [2022-07-19 22:00:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 392 states have (on average 1.1275510204081634) internal successors, (442), 404 states have internal predecessors, (442), 95 states have call successors, (95), 34 states have call predecessors, (95), 50 states have return successors, (151), 99 states have call predecessors, (151), 93 states have call successors, (151) [2022-07-19 22:00:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 688 transitions. [2022-07-19 22:00:37,866 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 688 transitions. Word has length 108 [2022-07-19 22:00:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:37,866 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 688 transitions. [2022-07-19 22:00:37,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 22:00:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 688 transitions. [2022-07-19 22:00:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-19 22:00:37,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:37,869 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:37,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 22:00:37,870 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1928597217, now seen corresponding path program 1 times [2022-07-19 22:00:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:37,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347194183] [2022-07-19 22:00:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:37,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 22:00:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:37,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 22:00:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:00:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:00:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:00:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:00:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:00:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 22:00:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 22:00:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-19 22:00:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-19 22:00:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 22:00:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347194183] [2022-07-19 22:00:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347194183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:38,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:38,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:00:38,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423472083] [2022-07-19 22:00:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:00:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:00:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:00:38,071 INFO L87 Difference]: Start difference. First operand 538 states and 688 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-19 22:00:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:38,530 INFO L93 Difference]: Finished difference Result 570 states and 741 transitions. [2022-07-19 22:00:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 22:00:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2022-07-19 22:00:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:38,533 INFO L225 Difference]: With dead ends: 570 [2022-07-19 22:00:38,533 INFO L226 Difference]: Without dead ends: 397 [2022-07-19 22:00:38,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:00:38,535 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 187 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:38,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 333 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 22:00:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-19 22:00:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 370. [2022-07-19 22:00:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 269 states have (on average 1.1226765799256506) internal successors, (302), 278 states have internal predecessors, (302), 67 states have call successors, (67), 22 states have call predecessors, (67), 33 states have return successors, (105), 69 states have call predecessors, (105), 63 states have call successors, (105) [2022-07-19 22:00:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 474 transitions. [2022-07-19 22:00:38,582 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 474 transitions. Word has length 116 [2022-07-19 22:00:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:38,583 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 474 transitions. [2022-07-19 22:00:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-19 22:00:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 474 transitions. [2022-07-19 22:00:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 22:00:38,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:38,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:38,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 22:00:38,585 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1800394554, now seen corresponding path program 1 times [2022-07-19 22:00:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:38,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760403209] [2022-07-19 22:00:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:00:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:00:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:00:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:00:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-19 22:00:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-19 22:00:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-19 22:00:39,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760403209] [2022-07-19 22:00:39,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760403209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:39,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:39,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 22:00:39,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070561209] [2022-07-19 22:00:39,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:39,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 22:00:39,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:39,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 22:00:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:00:39,129 INFO L87 Difference]: Start difference. First operand 370 states and 474 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 22:00:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:40,112 INFO L93 Difference]: Finished difference Result 378 states and 485 transitions. [2022-07-19 22:00:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 22:00:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2022-07-19 22:00:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:40,114 INFO L225 Difference]: With dead ends: 378 [2022-07-19 22:00:40,114 INFO L226 Difference]: Without dead ends: 345 [2022-07-19 22:00:40,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-07-19 22:00:40,115 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 133 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:40,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 666 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 22:00:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-19 22:00:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 328. [2022-07-19 22:00:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 237 states have (on average 1.1265822784810127) internal successors, (267), 244 states have internal predecessors, (267), 60 states have call successors, (60), 21 states have call predecessors, (60), 30 states have return successors, (97), 62 states have call predecessors, (97), 57 states have call successors, (97) [2022-07-19 22:00:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 424 transitions. [2022-07-19 22:00:40,156 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 424 transitions. Word has length 120 [2022-07-19 22:00:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:40,156 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 424 transitions. [2022-07-19 22:00:40,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 22:00:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 424 transitions. [2022-07-19 22:00:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 22:00:40,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:40,158 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:40,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 22:00:40,159 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2129347606, now seen corresponding path program 1 times [2022-07-19 22:00:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:40,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068760074] [2022-07-19 22:00:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-19 22:00:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-19 22:00:40,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:40,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068760074] [2022-07-19 22:00:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068760074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:40,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:00:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680059639] [2022-07-19 22:00:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:00:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:00:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:00:40,355 INFO L87 Difference]: Start difference. First operand 328 states and 424 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 22:00:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:40,852 INFO L93 Difference]: Finished difference Result 461 states and 618 transitions. [2022-07-19 22:00:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:00:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2022-07-19 22:00:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:40,854 INFO L225 Difference]: With dead ends: 461 [2022-07-19 22:00:40,854 INFO L226 Difference]: Without dead ends: 358 [2022-07-19 22:00:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:00:40,855 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 101 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:40,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 466 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 22:00:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-19 22:00:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 334. [2022-07-19 22:00:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 242 states have (on average 1.1239669421487604) internal successors, (272), 248 states have internal predecessors, (272), 60 states have call successors, (60), 21 states have call predecessors, (60), 31 states have return successors, (99), 64 states have call predecessors, (99), 57 states have call successors, (99) [2022-07-19 22:00:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 431 transitions. [2022-07-19 22:00:40,895 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 431 transitions. Word has length 121 [2022-07-19 22:00:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:40,896 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 431 transitions. [2022-07-19 22:00:40,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 22:00:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 431 transitions. [2022-07-19 22:00:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 22:00:40,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:40,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 22:00:40,898 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 762400777, now seen corresponding path program 1 times [2022-07-19 22:00:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558840323] [2022-07-19 22:00:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:00:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:00:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-19 22:00:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558840323] [2022-07-19 22:00:41,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558840323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:41,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:41,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 22:00:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356876182] [2022-07-19 22:00:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:00:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:00:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:00:41,106 INFO L87 Difference]: Start difference. First operand 334 states and 431 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:00:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:41,595 INFO L93 Difference]: Finished difference Result 435 states and 568 transitions. [2022-07-19 22:00:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 22:00:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2022-07-19 22:00:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:41,597 INFO L225 Difference]: With dead ends: 435 [2022-07-19 22:00:41,597 INFO L226 Difference]: Without dead ends: 343 [2022-07-19 22:00:41,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:00:41,597 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 252 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:41,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 480 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 22:00:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-19 22:00:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 326. [2022-07-19 22:00:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 236 states have (on average 1.1144067796610169) internal successors, (263), 243 states have internal predecessors, (263), 58 states have call successors, (58), 21 states have call predecessors, (58), 31 states have return successors, (97), 61 states have call predecessors, (97), 55 states have call successors, (97) [2022-07-19 22:00:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2022-07-19 22:00:41,640 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 127 [2022-07-19 22:00:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:41,640 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2022-07-19 22:00:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:00:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2022-07-19 22:00:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 22:00:41,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:41,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 22:00:41,643 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash -258129269, now seen corresponding path program 1 times [2022-07-19 22:00:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:41,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56958849] [2022-07-19 22:00:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:00:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:00:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 22:00:41,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:41,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56958849] [2022-07-19 22:00:41,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56958849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:41,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:41,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 22:00:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351312965] [2022-07-19 22:00:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:00:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:00:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:00:41,863 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:00:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:42,543 INFO L93 Difference]: Finished difference Result 353 states and 459 transitions. [2022-07-19 22:00:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:00:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2022-07-19 22:00:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:42,545 INFO L225 Difference]: With dead ends: 353 [2022-07-19 22:00:42,545 INFO L226 Difference]: Without dead ends: 349 [2022-07-19 22:00:42,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-19 22:00:42,546 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 286 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:42,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 609 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 22:00:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-19 22:00:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 333. [2022-07-19 22:00:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.112970711297071) internal successors, (266), 246 states have internal predecessors, (266), 61 states have call successors, (61), 22 states have call predecessors, (61), 32 states have return successors, (99), 64 states have call predecessors, (99), 58 states have call successors, (99) [2022-07-19 22:00:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 426 transitions. [2022-07-19 22:00:42,581 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 426 transitions. Word has length 127 [2022-07-19 22:00:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:42,581 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 426 transitions. [2022-07-19 22:00:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:00:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 426 transitions. [2022-07-19 22:00:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-19 22:00:42,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:42,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-19 22:00:42,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1955749090, now seen corresponding path program 1 times [2022-07-19 22:00:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:42,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199240355] [2022-07-19 22:00:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:42,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:00:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-19 22:00:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 22:00:42,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:42,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199240355] [2022-07-19 22:00:42,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199240355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:42,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:42,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 22:00:42,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83463566] [2022-07-19 22:00:42,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:00:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:00:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:00:42,795 INFO L87 Difference]: Start difference. First operand 333 states and 426 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:00:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:43,209 INFO L93 Difference]: Finished difference Result 460 states and 599 transitions. [2022-07-19 22:00:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:00:43,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2022-07-19 22:00:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:43,210 INFO L225 Difference]: With dead ends: 460 [2022-07-19 22:00:43,210 INFO L226 Difference]: Without dead ends: 351 [2022-07-19 22:00:43,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-19 22:00:43,211 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 173 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:43,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 550 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:00:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-19 22:00:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 333. [2022-07-19 22:00:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.112970711297071) internal successors, (266), 246 states have internal predecessors, (266), 61 states have call successors, (61), 22 states have call predecessors, (61), 32 states have return successors, (99), 64 states have call predecessors, (99), 58 states have call successors, (99) [2022-07-19 22:00:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 426 transitions. [2022-07-19 22:00:43,250 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 426 transitions. Word has length 128 [2022-07-19 22:00:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:43,250 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 426 transitions. [2022-07-19 22:00:43,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:00:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 426 transitions. [2022-07-19 22:00:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-19 22:00:43,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:43,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:43,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 22:00:43,253 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1110255069, now seen corresponding path program 1 times [2022-07-19 22:00:43,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066265217] [2022-07-19 22:00:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:00:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-19 22:00:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 22:00:43,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066265217] [2022-07-19 22:00:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066265217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:00:43,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:00:43,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 22:00:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47009833] [2022-07-19 22:00:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:00:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:00:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:00:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:00:43,462 INFO L87 Difference]: Start difference. First operand 333 states and 426 transitions. Second operand has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:00:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:43,998 INFO L93 Difference]: Finished difference Result 351 states and 450 transitions. [2022-07-19 22:00:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 22:00:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2022-07-19 22:00:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:44,000 INFO L225 Difference]: With dead ends: 351 [2022-07-19 22:00:44,000 INFO L226 Difference]: Without dead ends: 349 [2022-07-19 22:00:44,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:00:44,001 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 185 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:44,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 725 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 22:00:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-19 22:00:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 340. [2022-07-19 22:00:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 242 states have (on average 1.1115702479338843) internal successors, (269), 249 states have internal predecessors, (269), 64 states have call successors, (64), 23 states have call predecessors, (64), 33 states have return successors, (102), 67 states have call predecessors, (102), 61 states have call successors, (102) [2022-07-19 22:00:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 435 transitions. [2022-07-19 22:00:44,045 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 435 transitions. Word has length 129 [2022-07-19 22:00:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:44,045 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 435 transitions. [2022-07-19 22:00:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:00:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 435 transitions. [2022-07-19 22:00:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 22:00:44,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:44,047 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 22:00:44,048 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1642854161, now seen corresponding path program 1 times [2022-07-19 22:00:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811192414] [2022-07-19 22:00:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:00:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:00:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-19 22:00:44,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811192414] [2022-07-19 22:00:44,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811192414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896362203] [2022-07-19 22:00:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:44,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:44,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:44,443 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:44,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 22:00:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 22:00:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 22:00:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:45,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-19 22:00:45,767 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 22:00:45,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-07-19 22:00:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:00:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896362203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:45,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:45,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 27 [2022-07-19 22:00:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166887062] [2022-07-19 22:00:45,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:00:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:00:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:00:45,796 INFO L87 Difference]: Start difference. First operand 340 states and 435 transitions. Second operand has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-19 22:00:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:48,251 INFO L93 Difference]: Finished difference Result 631 states and 799 transitions. [2022-07-19 22:00:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 22:00:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) Word has length 131 [2022-07-19 22:00:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:48,253 INFO L225 Difference]: With dead ends: 631 [2022-07-19 22:00:48,253 INFO L226 Difference]: Without dead ends: 381 [2022-07-19 22:00:48,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 280 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=1867, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 22:00:48,255 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 278 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:48,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1179 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2735 Invalid, 0 Unknown, 574 Unchecked, 1.7s Time] [2022-07-19 22:00:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-19 22:00:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 346. [2022-07-19 22:00:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 249 states have (on average 1.104417670682731) internal successors, (275), 255 states have internal predecessors, (275), 63 states have call successors, (63), 24 states have call predecessors, (63), 33 states have return successors, (100), 66 states have call predecessors, (100), 60 states have call successors, (100) [2022-07-19 22:00:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 438 transitions. [2022-07-19 22:00:48,293 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 438 transitions. Word has length 131 [2022-07-19 22:00:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:48,294 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 438 transitions. [2022-07-19 22:00:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-19 22:00:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 438 transitions. [2022-07-19 22:00:48,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 22:00:48,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:48,295 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:48,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 22:00:48,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:48,496 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 291468943, now seen corresponding path program 1 times [2022-07-19 22:00:48,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305707483] [2022-07-19 22:00:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:00:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:00:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 22:00:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305707483] [2022-07-19 22:00:49,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305707483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173375623] [2022-07-19 22:00:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:49,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:49,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:49,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:49,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 22:00:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 22:00:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:49,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:00:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 22:00:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:00:51,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173375623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:51,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:51,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 10] total 37 [2022-07-19 22:00:51,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559659140] [2022-07-19 22:00:51,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:51,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 22:00:51,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 22:00:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 22:00:51,050 INFO L87 Difference]: Start difference. First operand 346 states and 438 transitions. Second operand has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) [2022-07-19 22:00:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:00:53,108 INFO L93 Difference]: Finished difference Result 432 states and 547 transitions. [2022-07-19 22:00:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 22:00:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) Word has length 131 [2022-07-19 22:00:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:00:53,111 INFO L225 Difference]: With dead ends: 432 [2022-07-19 22:00:53,111 INFO L226 Difference]: Without dead ends: 407 [2022-07-19 22:00:53,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 22:00:53,112 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 435 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:00:53,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1216 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2288 Invalid, 0 Unknown, 491 Unchecked, 1.4s Time] [2022-07-19 22:00:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-19 22:00:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 368. [2022-07-19 22:00:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 265 states have (on average 1.0981132075471698) internal successors, (291), 273 states have internal predecessors, (291), 65 states have call successors, (65), 26 states have call predecessors, (65), 37 states have return successors, (114), 68 states have call predecessors, (114), 62 states have call successors, (114) [2022-07-19 22:00:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 470 transitions. [2022-07-19 22:00:53,159 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 470 transitions. Word has length 131 [2022-07-19 22:00:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:00:53,159 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 470 transitions. [2022-07-19 22:00:53,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) [2022-07-19 22:00:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 470 transitions. [2022-07-19 22:00:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 22:00:53,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:00:53,160 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:00:53,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 22:00:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:53,361 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:00:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:00:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1460059221, now seen corresponding path program 1 times [2022-07-19 22:00:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:00:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865547414] [2022-07-19 22:00:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:00:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:00:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:00:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:00:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:00:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:00:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:00:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:00:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:00:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:00:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:00:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:00:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:00:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:00:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-19 22:00:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:00:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865547414] [2022-07-19 22:00:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865547414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:00:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729586216] [2022-07-19 22:00:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:00:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:00:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:00:53,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:00:53,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 22:00:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:00:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 22:00:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:00:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 39 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:00:55,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:00:59,267 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 22:00:59,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2022-07-19 22:00:59,447 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-19 22:00:59,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2022-07-19 22:00:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:00:59,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729586216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:00:59,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:00:59,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-07-19 22:00:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793875060] [2022-07-19 22:00:59,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:00:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 22:00:59,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:00:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 22:00:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 22:00:59,535 INFO L87 Difference]: Start difference. First operand 368 states and 470 transitions. Second operand has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-19 22:01:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:04,972 INFO L93 Difference]: Finished difference Result 713 states and 916 transitions. [2022-07-19 22:01:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 22:01:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) Word has length 131 [2022-07-19 22:01:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:04,974 INFO L225 Difference]: With dead ends: 713 [2022-07-19 22:01:04,974 INFO L226 Difference]: Without dead ends: 482 [2022-07-19 22:01:04,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 255 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=794, Invalid=5212, Unknown=0, NotChecked=0, Total=6006 [2022-07-19 22:01:04,976 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 452 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 4353 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 5561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:04,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 2376 Invalid, 5561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4353 Invalid, 0 Unknown, 1012 Unchecked, 3.3s Time] [2022-07-19 22:01:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-19 22:01:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 400. [2022-07-19 22:01:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 295 states have (on average 1.0949152542372882) internal successors, (323), 301 states have internal predecessors, (323), 64 states have call successors, (64), 30 states have call predecessors, (64), 40 states have return successors, (107), 68 states have call predecessors, (107), 61 states have call successors, (107) [2022-07-19 22:01:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 494 transitions. [2022-07-19 22:01:05,033 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 494 transitions. Word has length 131 [2022-07-19 22:01:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:05,035 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 494 transitions. [2022-07-19 22:01:05,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-19 22:01:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 494 transitions. [2022-07-19 22:01:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 22:01:05,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:05,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:05,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 22:01:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:05,247 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2079477013, now seen corresponding path program 1 times [2022-07-19 22:01:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:05,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704798376] [2022-07-19 22:01:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:05,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:01:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:01:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:01:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704798376] [2022-07-19 22:01:05,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704798376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656000021] [2022-07-19 22:01:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:05,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:05,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:01:05,976 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:01:05,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 22:01:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 22:01:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:01:06,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:01:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:01:07,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:01:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:01:08,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656000021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:01:08,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:01:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 14] total 40 [2022-07-19 22:01:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910790986] [2022-07-19 22:01:08,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:01:08,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 22:01:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 22:01:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 22:01:08,886 INFO L87 Difference]: Start difference. First operand 400 states and 494 transitions. Second operand has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-19 22:01:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:12,404 INFO L93 Difference]: Finished difference Result 471 states and 573 transitions. [2022-07-19 22:01:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 22:01:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) Word has length 131 [2022-07-19 22:01:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:12,407 INFO L225 Difference]: With dead ends: 471 [2022-07-19 22:01:12,407 INFO L226 Difference]: Without dead ends: 459 [2022-07-19 22:01:12,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 258 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 22:01:12,408 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 395 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:12,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1066 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2615 Invalid, 0 Unknown, 562 Unchecked, 1.8s Time] [2022-07-19 22:01:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-19 22:01:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 430. [2022-07-19 22:01:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 322 states have (on average 1.093167701863354) internal successors, (352), 328 states have internal predecessors, (352), 64 states have call successors, (64), 33 states have call predecessors, (64), 43 states have return successors, (105), 68 states have call predecessors, (105), 61 states have call successors, (105) [2022-07-19 22:01:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 521 transitions. [2022-07-19 22:01:12,471 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 521 transitions. Word has length 131 [2022-07-19 22:01:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:12,471 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 521 transitions. [2022-07-19 22:01:12,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-19 22:01:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 521 transitions. [2022-07-19 22:01:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 22:01:12,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:12,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:12,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 22:01:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:12,674 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 367115802, now seen corresponding path program 1 times [2022-07-19 22:01:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:12,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594629644] [2022-07-19 22:01:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:01:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:01:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-19 22:01:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594629644] [2022-07-19 22:01:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594629644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:12,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:12,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 22:01:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000230289] [2022-07-19 22:01:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 22:01:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 22:01:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:01:12,922 INFO L87 Difference]: Start difference. First operand 430 states and 521 transitions. Second operand has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:01:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:13,777 INFO L93 Difference]: Finished difference Result 483 states and 612 transitions. [2022-07-19 22:01:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 22:01:13,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 133 [2022-07-19 22:01:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:13,780 INFO L225 Difference]: With dead ends: 483 [2022-07-19 22:01:13,780 INFO L226 Difference]: Without dead ends: 443 [2022-07-19 22:01:13,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-07-19 22:01:13,782 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 279 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:13,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 788 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 22:01:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-19 22:01:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 372. [2022-07-19 22:01:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 272 states have (on average 1.0919117647058822) internal successors, (297), 277 states have internal predecessors, (297), 62 states have call successors, (62), 30 states have call predecessors, (62), 37 states have return successors, (96), 64 states have call predecessors, (96), 59 states have call successors, (96) [2022-07-19 22:01:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 455 transitions. [2022-07-19 22:01:13,840 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 455 transitions. Word has length 133 [2022-07-19 22:01:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:13,840 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 455 transitions. [2022-07-19 22:01:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:01:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 455 transitions. [2022-07-19 22:01:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 22:01:13,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:13,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:13,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-19 22:01:13,843 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2135163427, now seen corresponding path program 1 times [2022-07-19 22:01:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009751662] [2022-07-19 22:01:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:13,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-19 22:01:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-19 22:01:14,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:14,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009751662] [2022-07-19 22:01:14,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009751662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:14,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:14,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:01:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513301867] [2022-07-19 22:01:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:01:14,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:01:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:01:14,106 INFO L87 Difference]: Start difference. First operand 372 states and 455 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:14,465 INFO L93 Difference]: Finished difference Result 539 states and 667 transitions. [2022-07-19 22:01:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:01:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2022-07-19 22:01:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:14,466 INFO L225 Difference]: With dead ends: 539 [2022-07-19 22:01:14,466 INFO L226 Difference]: Without dead ends: 362 [2022-07-19 22:01:14,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:01:14,467 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 175 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:14,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 377 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:01:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-19 22:01:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 356. [2022-07-19 22:01:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 262 states have (on average 1.0763358778625953) internal successors, (282), 267 states have internal predecessors, (282), 57 states have call successors, (57), 29 states have call predecessors, (57), 36 states have return successors, (91), 59 states have call predecessors, (91), 54 states have call successors, (91) [2022-07-19 22:01:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 430 transitions. [2022-07-19 22:01:14,506 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 430 transitions. Word has length 133 [2022-07-19 22:01:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:14,506 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 430 transitions. [2022-07-19 22:01:14,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 430 transitions. [2022-07-19 22:01:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 22:01:14,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:14,507 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:14,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 22:01:14,507 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -671775652, now seen corresponding path program 1 times [2022-07-19 22:01:14,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967737108] [2022-07-19 22:01:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:14,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 22:01:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:14,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 22:01:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 22:01:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967737108] [2022-07-19 22:01:15,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967737108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:15,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:15,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-19 22:01:15,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542010571] [2022-07-19 22:01:15,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 22:01:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 22:01:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2022-07-19 22:01:15,147 INFO L87 Difference]: Start difference. First operand 356 states and 430 transitions. Second operand has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:16,688 INFO L93 Difference]: Finished difference Result 370 states and 446 transitions. [2022-07-19 22:01:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 22:01:16,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2022-07-19 22:01:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:16,689 INFO L225 Difference]: With dead ends: 370 [2022-07-19 22:01:16,689 INFO L226 Difference]: Without dead ends: 349 [2022-07-19 22:01:16,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 22:01:16,691 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 313 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:16,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 716 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 22:01:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-19 22:01:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2022-07-19 22:01:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 251 states have (on average 1.0756972111553784) internal successors, (270), 256 states have internal predecessors, (270), 55 states have call successors, (55), 27 states have call predecessors, (55), 34 states have return successors, (87), 57 states have call predecessors, (87), 52 states have call successors, (87) [2022-07-19 22:01:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 412 transitions. [2022-07-19 22:01:16,729 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 412 transitions. Word has length 133 [2022-07-19 22:01:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:16,729 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 412 transitions. [2022-07-19 22:01:16,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 412 transitions. [2022-07-19 22:01:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 22:01:16,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:16,731 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:16,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 22:01:16,732 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1709701502, now seen corresponding path program 1 times [2022-07-19 22:01:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:16,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123156431] [2022-07-19 22:01:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-19 22:01:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123156431] [2022-07-19 22:01:17,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123156431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:17,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:17,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 22:01:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878792471] [2022-07-19 22:01:17,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 22:01:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 22:01:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:01:17,174 INFO L87 Difference]: Start difference. First operand 341 states and 412 transitions. Second operand has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-19 22:01:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:17,878 INFO L93 Difference]: Finished difference Result 488 states and 597 transitions. [2022-07-19 22:01:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:01:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 134 [2022-07-19 22:01:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:17,881 INFO L225 Difference]: With dead ends: 488 [2022-07-19 22:01:17,881 INFO L226 Difference]: Without dead ends: 333 [2022-07-19 22:01:17,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-07-19 22:01:17,882 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 219 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:17,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 656 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 22:01:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-19 22:01:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-07-19 22:01:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 244 states have (on average 1.0655737704918034) internal successors, (260), 250 states have internal predecessors, (260), 55 states have call successors, (55), 27 states have call predecessors, (55), 33 states have return successors, (85), 55 states have call predecessors, (85), 52 states have call successors, (85) [2022-07-19 22:01:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 400 transitions. [2022-07-19 22:01:17,933 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 400 transitions. Word has length 134 [2022-07-19 22:01:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:17,933 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 400 transitions. [2022-07-19 22:01:17,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-19 22:01:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 400 transitions. [2022-07-19 22:01:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 22:01:17,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:17,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 22:01:17,936 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1572439748, now seen corresponding path program 1 times [2022-07-19 22:01:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:17,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030961451] [2022-07-19 22:01:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 22:01:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030961451] [2022-07-19 22:01:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030961451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129437194] [2022-07-19 22:01:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:18,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:01:18,699 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:01:18,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 22:01:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 22:01:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:01:19,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-19 22:01:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 22:01:23,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:01:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129437194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:23,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:01:23,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2022-07-19 22:01:23,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623765948] [2022-07-19 22:01:23,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:23,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:01:23,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:01:23,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2022-07-19 22:01:23,666 INFO L87 Difference]: Start difference. First operand 333 states and 400 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:23,801 INFO L93 Difference]: Finished difference Result 444 states and 523 transitions. [2022-07-19 22:01:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 22:01:23,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 134 [2022-07-19 22:01:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:23,803 INFO L225 Difference]: With dead ends: 444 [2022-07-19 22:01:23,803 INFO L226 Difference]: Without dead ends: 330 [2022-07-19 22:01:23,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=99, Invalid=829, Unknown=2, NotChecked=0, Total=930 [2022-07-19 22:01:23,804 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 42 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:23,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 582 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-07-19 22:01:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-19 22:01:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2022-07-19 22:01:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 241 states have (on average 1.066390041493776) internal successors, (257), 247 states have internal predecessors, (257), 53 states have call successors, (53), 26 states have call predecessors, (53), 32 states have return successors, (79), 53 states have call predecessors, (79), 50 states have call successors, (79) [2022-07-19 22:01:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 389 transitions. [2022-07-19 22:01:23,847 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 389 transitions. Word has length 134 [2022-07-19 22:01:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 389 transitions. [2022-07-19 22:01:23,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 22:01:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 389 transitions. [2022-07-19 22:01:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 22:01:23,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:23,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:23,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 22:01:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-19 22:01:24,057 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 845092170, now seen corresponding path program 1 times [2022-07-19 22:01:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950481458] [2022-07-19 22:01:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 22:01:24,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950481458] [2022-07-19 22:01:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950481458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580487778] [2022-07-19 22:01:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:24,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:24,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:01:24,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:01:24,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 22:01:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-19 22:01:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:01:25,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:01:26,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 21 [2022-07-19 22:01:26,891 WARN L855 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int)) (and (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1935 (Array Int Int))) (= (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| v_ArrVal_1935) |c_#memory_int|)))) is different from true [2022-07-19 22:01:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:26,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-19 22:01:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:26,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:01:26,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-07-19 22:01:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:27,058 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:01:27,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 41 [2022-07-19 22:01:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:01:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:01:28,180 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (Array Int Int)) (v_ArrVal_1937 Int) (|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| Int)) (or (<= (mod (select (select (let ((.cse0 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| v_ArrVal_1942))) (store .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_ArrVal_1937))) |c_aws_byte_buf_reserve_~buffer#1.base|) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) (mod |c_aws_byte_buf_reserve_~requested_capacity#1| 18446744073709551616)) (not (< |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| |c_#StackHeapBarrier|)))) is different from false [2022-07-19 22:01:28,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580487778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:28,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:01:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 42 [2022-07-19 22:01:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599243773] [2022-07-19 22:01:28,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:01:28,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 22:01:28,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 22:01:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2058, Unknown=2, NotChecked=186, Total=2450 [2022-07-19 22:01:28,183 INFO L87 Difference]: Start difference. First operand 327 states and 389 transitions. Second operand has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-19 22:01:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:30,810 INFO L93 Difference]: Finished difference Result 479 states and 575 transitions. [2022-07-19 22:01:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 22:01:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) Word has length 134 [2022-07-19 22:01:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:30,811 INFO L225 Difference]: With dead ends: 479 [2022-07-19 22:01:30,812 INFO L226 Difference]: Without dead ends: 378 [2022-07-19 22:01:30,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=564, Invalid=4956, Unknown=38, NotChecked=294, Total=5852 [2022-07-19 22:01:30,812 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 361 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:30,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1326 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1818 Invalid, 0 Unknown, 1046 Unchecked, 1.3s Time] [2022-07-19 22:01:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-19 22:01:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2022-07-19 22:01:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 242 states have (on average 1.0661157024793388) internal successors, (258), 247 states have internal predecessors, (258), 51 states have call successors, (51), 26 states have call predecessors, (51), 31 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2022-07-19 22:01:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 376 transitions. [2022-07-19 22:01:30,861 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 376 transitions. Word has length 134 [2022-07-19 22:01:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:30,861 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 376 transitions. [2022-07-19 22:01:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-19 22:01:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 376 transitions. [2022-07-19 22:01:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 22:01:30,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:30,863 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:30,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 22:01:31,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 22:01:31,083 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1553937270, now seen corresponding path program 1 times [2022-07-19 22:01:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:31,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51563000] [2022-07-19 22:01:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 22:01:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51563000] [2022-07-19 22:01:32,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51563000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124285252] [2022-07-19 22:01:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:32,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:01:32,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:01:32,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 22:01:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-19 22:01:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:01:33,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:01:45,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 24 [2022-07-19 22:01:45,194 WARN L855 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int)) (and (exists ((v_ArrVal_2065 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| v_ArrVal_2065))) (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|))) is different from true [2022-07-19 22:01:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:45,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2022-07-19 22:01:45,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:45,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:01:45,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 52 [2022-07-19 22:01:45,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:01:45,394 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:01:45,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 44 [2022-07-19 22:01:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:01:46,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:01:51,779 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2072 (Array Int Int)) (v_ArrVal_2066 Int) (|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| Int)) (or (<= (mod (select (select (let ((.cse0 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| v_ArrVal_2072))) (store .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_ArrVal_2066))) |c_aws_byte_buf_reserve_~buffer#1.base|) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) (mod |c_aws_byte_buf_reserve_~requested_capacity#1| 18446744073709551616)) (not (< |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| |c_#StackHeapBarrier|)))) is different from false [2022-07-19 22:01:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124285252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:01:51,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:01:51,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 46 [2022-07-19 22:01:51,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400399011] [2022-07-19 22:01:51,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:01:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 22:01:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 22:01:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2178, Unknown=7, NotChecked=190, Total=2550 [2022-07-19 22:01:51,782 INFO L87 Difference]: Start difference. First operand 325 states and 376 transitions. Second operand has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-19 22:01:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:57,678 INFO L93 Difference]: Finished difference Result 466 states and 531 transitions. [2022-07-19 22:01:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 22:01:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 134 [2022-07-19 22:01:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:57,680 INFO L225 Difference]: With dead ends: 466 [2022-07-19 22:01:57,680 INFO L226 Difference]: Without dead ends: 306 [2022-07-19 22:01:57,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 155 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=738, Invalid=6572, Unknown=8, NotChecked=338, Total=7656 [2022-07-19 22:01:57,681 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 294 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:57,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1073 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3021 Invalid, 0 Unknown, 1287 Unchecked, 2.5s Time] [2022-07-19 22:01:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-19 22:01:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 286. [2022-07-19 22:01:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 214 states have (on average 1.0654205607476634) internal successors, (228), 218 states have internal predecessors, (228), 44 states have call successors, (44), 23 states have call predecessors, (44), 27 states have return successors, (57), 44 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-19 22:01:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 329 transitions. [2022-07-19 22:01:57,722 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 329 transitions. Word has length 134 [2022-07-19 22:01:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:57,722 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 329 transitions. [2022-07-19 22:01:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-19 22:01:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 329 transitions. [2022-07-19 22:01:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 22:01:57,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:57,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:57,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 22:01:57,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:01:57,924 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 462581892, now seen corresponding path program 1 times [2022-07-19 22:01:57,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112913102] [2022-07-19 22:01:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-19 22:01:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112913102] [2022-07-19 22:01:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112913102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:58,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 22:01:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482687728] [2022-07-19 22:01:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:58,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:01:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:01:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 22:01:58,073 INFO L87 Difference]: Start difference. First operand 286 states and 329 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:01:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:58,321 INFO L93 Difference]: Finished difference Result 370 states and 430 transitions. [2022-07-19 22:01:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:01:58,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-07-19 22:01:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:58,322 INFO L225 Difference]: With dead ends: 370 [2022-07-19 22:01:58,322 INFO L226 Difference]: Without dead ends: 286 [2022-07-19 22:01:58,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:01:58,323 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 67 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:58,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 314 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:01:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-07-19 22:01:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-07-19 22:01:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 214 states have (on average 1.0560747663551402) internal successors, (226), 218 states have internal predecessors, (226), 44 states have call successors, (44), 23 states have call predecessors, (44), 27 states have return successors, (57), 44 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-19 22:01:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 327 transitions. [2022-07-19 22:01:58,360 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 327 transitions. Word has length 134 [2022-07-19 22:01:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:58,360 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 327 transitions. [2022-07-19 22:01:58,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 22:01:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 327 transitions. [2022-07-19 22:01:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-19 22:01:58,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:58,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-19 22:01:58,362 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -641305329, now seen corresponding path program 1 times [2022-07-19 22:01:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:58,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91846344] [2022-07-19 22:01:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:01:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:01:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:01:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:01:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:01:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:01:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:01:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:01:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:01:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:01:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:01:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:01:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:01:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:01:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 22:01:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:01:58,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91846344] [2022-07-19 22:01:58,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91846344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:01:58,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:01:58,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 22:01:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707080732] [2022-07-19 22:01:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:01:58,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 22:01:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:01:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 22:01:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-19 22:01:58,619 INFO L87 Difference]: Start difference. First operand 286 states and 327 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:01:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:01:59,275 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2022-07-19 22:01:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 22:01:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 136 [2022-07-19 22:01:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:01:59,277 INFO L225 Difference]: With dead ends: 294 [2022-07-19 22:01:59,277 INFO L226 Difference]: Without dead ends: 292 [2022-07-19 22:01:59,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-19 22:01:59,278 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 90 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 22:01:59,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 743 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 22:01:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-19 22:01:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-07-19 22:01:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 217 states have (on average 1.055299539170507) internal successors, (229), 221 states have internal predecessors, (229), 45 states have call successors, (45), 24 states have call predecessors, (45), 28 states have return successors, (58), 45 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-19 22:01:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-19 22:01:59,330 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 136 [2022-07-19 22:01:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:01:59,330 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-19 22:01:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-19 22:01:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-19 22:01:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-19 22:01:59,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:01:59,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:01:59,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-19 22:01:59,332 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:01:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:01:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 59759249, now seen corresponding path program 1 times [2022-07-19 22:01:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:01:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258637116] [2022-07-19 22:01:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:01:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:01:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:02:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:02:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:02:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:02:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:02:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 22:02:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-19 22:02:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258637116] [2022-07-19 22:02:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258637116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:02:00,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:02:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-19 22:02:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085499716] [2022-07-19 22:02:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:02:00,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:02:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:02:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:02:00,559 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-19 22:02:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:02,660 INFO L93 Difference]: Finished difference Result 297 states and 337 transitions. [2022-07-19 22:02:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 22:02:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) Word has length 136 [2022-07-19 22:02:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:02,661 INFO L225 Difference]: With dead ends: 297 [2022-07-19 22:02:02,661 INFO L226 Difference]: Without dead ends: 295 [2022-07-19 22:02:02,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 22:02:02,662 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 202 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:02,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 923 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 22:02:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-19 22:02:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-07-19 22:02:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 220 states have (on average 1.0545454545454545) internal successors, (232), 224 states have internal predecessors, (232), 45 states have call successors, (45), 25 states have call predecessors, (45), 29 states have return successors, (58), 45 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-19 22:02:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 335 transitions. [2022-07-19 22:02:02,718 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 335 transitions. Word has length 136 [2022-07-19 22:02:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:02,718 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 335 transitions. [2022-07-19 22:02:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-19 22:02:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 335 transitions. [2022-07-19 22:02:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-19 22:02:02,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:02,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:02,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-19 22:02:02,720 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2034696283, now seen corresponding path program 1 times [2022-07-19 22:02:02,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784703579] [2022-07-19 22:02:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:02,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:02:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:02:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:02:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:02:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:02:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-19 22:02:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 22:02:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-19 22:02:03,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784703579] [2022-07-19 22:02:03,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784703579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:02:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929510669] [2022-07-19 22:02:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:03,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:02:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:02:03,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:02:03,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 22:02:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 22:02:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:02:04,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:02:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 22:02:04,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:02:05,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929510669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:02:05,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 22:02:05,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 34 [2022-07-19 22:02:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308361587] [2022-07-19 22:02:05,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 22:02:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 22:02:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 22:02:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 22:02:05,038 INFO L87 Difference]: Start difference. First operand 295 states and 335 transitions. Second operand has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-19 22:02:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:06,973 INFO L93 Difference]: Finished difference Result 328 states and 371 transitions. [2022-07-19 22:02:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 22:02:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 138 [2022-07-19 22:02:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:06,975 INFO L225 Difference]: With dead ends: 328 [2022-07-19 22:02:06,975 INFO L226 Difference]: Without dead ends: 286 [2022-07-19 22:02:06,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-07-19 22:02:06,976 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 336 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:06,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1102 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1910 Invalid, 0 Unknown, 414 Unchecked, 1.1s Time] [2022-07-19 22:02:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-07-19 22:02:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2022-07-19 22:02:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 207 states have (on average 1.0531400966183575) internal successors, (218), 211 states have internal predecessors, (218), 42 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (54), 42 states have call predecessors, (54), 41 states have call successors, (54) [2022-07-19 22:02:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2022-07-19 22:02:07,017 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 138 [2022-07-19 22:02:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:07,017 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2022-07-19 22:02:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-19 22:02:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2022-07-19 22:02:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-19 22:02:07,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:07,018 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:07,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 22:02:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:02:07,219 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1512809225, now seen corresponding path program 1 times [2022-07-19 22:02:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311069411] [2022-07-19 22:02:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:02:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 22:02:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 22:02:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 22:02:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 22:02:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-19 22:02:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 22:02:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-19 22:02:07,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311069411] [2022-07-19 22:02:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311069411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:02:07,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:02:07,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 22:02:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385982559] [2022-07-19 22:02:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:02:07,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:02:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:02:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:02:07,411 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 22:02:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:07,765 INFO L93 Difference]: Finished difference Result 343 states and 387 transitions. [2022-07-19 22:02:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:02:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 140 [2022-07-19 22:02:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:07,767 INFO L225 Difference]: With dead ends: 343 [2022-07-19 22:02:07,767 INFO L226 Difference]: Without dead ends: 247 [2022-07-19 22:02:07,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:02:07,767 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 174 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:07,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 395 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:02:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-19 22:02:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2022-07-19 22:02:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 185 states have (on average 1.0486486486486486) internal successors, (194), 187 states have internal predecessors, (194), 34 states have call successors, (34), 21 states have call predecessors, (34), 22 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-19 22:02:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 266 transitions. [2022-07-19 22:02:07,795 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 266 transitions. Word has length 140 [2022-07-19 22:02:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:07,795 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 266 transitions. [2022-07-19 22:02:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 22:02:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 266 transitions. [2022-07-19 22:02:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 22:02:07,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:07,796 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:07,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-19 22:02:07,796 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash -271908259, now seen corresponding path program 1 times [2022-07-19 22:02:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587520928] [2022-07-19 22:02:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:07,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:02:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:02:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:02:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 22:02:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 22:02:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:02:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:02:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:02:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 22:02:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-19 22:02:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-19 22:02:09,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587520928] [2022-07-19 22:02:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587520928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:02:09,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:02:09,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-19 22:02:09,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586571754] [2022-07-19 22:02:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:02:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 22:02:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 22:02:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-19 22:02:09,385 INFO L87 Difference]: Start difference. First operand 242 states and 266 transitions. Second operand has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-19 22:02:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:10,907 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2022-07-19 22:02:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 22:02:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 158 [2022-07-19 22:02:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:10,908 INFO L225 Difference]: With dead ends: 258 [2022-07-19 22:02:10,909 INFO L226 Difference]: Without dead ends: 256 [2022-07-19 22:02:10,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 22:02:10,909 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:10,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 444 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 22:02:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-19 22:02:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-07-19 22:02:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 188 states have (on average 1.047872340425532) internal successors, (197), 190 states have internal predecessors, (197), 34 states have call successors, (34), 22 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-19 22:02:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 269 transitions. [2022-07-19 22:02:10,944 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 269 transitions. Word has length 158 [2022-07-19 22:02:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:10,945 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 269 transitions. [2022-07-19 22:02:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-19 22:02:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 269 transitions. [2022-07-19 22:02:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 22:02:10,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:10,946 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-19 22:02:10,946 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1688655625, now seen corresponding path program 1 times [2022-07-19 22:02:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:10,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956058550] [2022-07-19 22:02:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:02:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:02:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:02:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 22:02:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 22:02:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:02:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:02:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:02:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 22:02:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 22:02:11,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:11,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956058550] [2022-07-19 22:02:11,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956058550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:02:11,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:02:11,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:02:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472266108] [2022-07-19 22:02:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:02:11,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:02:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:02:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:02:11,180 INFO L87 Difference]: Start difference. First operand 246 states and 269 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-19 22:02:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:11,463 INFO L93 Difference]: Finished difference Result 307 states and 337 transitions. [2022-07-19 22:02:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:02:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2022-07-19 22:02:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:11,465 INFO L225 Difference]: With dead ends: 307 [2022-07-19 22:02:11,465 INFO L226 Difference]: Without dead ends: 246 [2022-07-19 22:02:11,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:02:11,466 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 106 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:11,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 253 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:02:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-19 22:02:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-07-19 22:02:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 188 states have (on average 1.0425531914893618) internal successors, (196), 190 states have internal predecessors, (196), 34 states have call successors, (34), 22 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-19 22:02:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 268 transitions. [2022-07-19 22:02:11,506 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 268 transitions. Word has length 162 [2022-07-19 22:02:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:11,506 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 268 transitions. [2022-07-19 22:02:11,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-19 22:02:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 268 transitions. [2022-07-19 22:02:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-19 22:02:11,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:11,508 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-19 22:02:11,509 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1779804813, now seen corresponding path program 1 times [2022-07-19 22:02:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:11,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942363060] [2022-07-19 22:02:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:11,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:02:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:02:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:02:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 22:02:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 22:02:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:02:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:02:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:02:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 22:02:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-19 22:02:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-07-19 22:02:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-19 22:02:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 22:02:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942363060] [2022-07-19 22:02:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942363060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:02:12,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:02:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-19 22:02:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699306939] [2022-07-19 22:02:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:02:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 22:02:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:02:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 22:02:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:02:12,416 INFO L87 Difference]: Start difference. First operand 246 states and 268 transitions. Second operand has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-19 22:02:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:02:13,401 INFO L93 Difference]: Finished difference Result 270 states and 294 transitions. [2022-07-19 22:02:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:02:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 180 [2022-07-19 22:02:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:02:13,403 INFO L225 Difference]: With dead ends: 270 [2022-07-19 22:02:13,403 INFO L226 Difference]: Without dead ends: 233 [2022-07-19 22:02:13,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-07-19 22:02:13,404 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 222 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:02:13,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 498 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 22:02:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-19 22:02:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2022-07-19 22:02:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 175 states have internal predecessors, (178), 34 states have call successors, (34), 21 states have call predecessors, (34), 22 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2022-07-19 22:02:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 249 transitions. [2022-07-19 22:02:13,461 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 249 transitions. Word has length 180 [2022-07-19 22:02:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:02:13,462 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 249 transitions. [2022-07-19 22:02:13,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-19 22:02:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 249 transitions. [2022-07-19 22:02:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-19 22:02:13,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:02:13,463 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:02:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-19 22:02:13,464 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:02:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:02:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -611214535, now seen corresponding path program 1 times [2022-07-19 22:02:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:02:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760042208] [2022-07-19 22:02:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:02:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:02:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:02:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 22:02:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:02:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 22:02:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:02:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:02:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 22:02:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:02:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 22:02:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 22:02:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:02:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:02:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:02:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 22:02:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 22:02:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-19 22:02:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-07-19 22:02:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-19 22:02:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-19 22:02:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:02:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760042208] [2022-07-19 22:02:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760042208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:02:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419913956] [2022-07-19 22:02:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:02:13,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:02:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:02:13,976 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:02:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 22:02:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:02:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-19 22:02:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:02:14,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 22:02:14,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-19 22:02:14,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-19 22:02:24,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-19 22:02:26,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-19 22:02:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 70 proven. 35 refuted. 7 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 22:02:38,746 INFO L328 TraceCheckSpWp]: Computing backward predicates...