./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_append_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 aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:00:45,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:00:45,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:00:45,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:00:45,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:00:45,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:00:45,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:00:45,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:00:45,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:00:45,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:00:45,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:00:45,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:00:45,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:00:45,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:00:45,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:00:45,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:00:45,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:00:45,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:00:45,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:00:45,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:00:45,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:00:45,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:00:45,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:00:45,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:00:45,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:00:45,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:00:45,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:00:45,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:00:45,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:00:45,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:00:45,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:00:45,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:00:45,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:00:45,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:00:45,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:00:45,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:00:45,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:00:45,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:00:45,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:00:45,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:00:45,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:00:45,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:00:45,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:00:45,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:00:45,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:00:45,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:00:45,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:00:45,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:00:45,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:00:45,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:00:45,701 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:00:45,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:00:45,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:00:45,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:00:45,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:00:45,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:00:45,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:00:45,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:00:45,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:00:45,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:00:45,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:00:45,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:00:45,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:00:45,704 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:00:45,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:00:45,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:00:45,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:00:45,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 [2021-12-14 17:00:45,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:00:45,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:00:45,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:00:46,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:00:46,001 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:00:46,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-14 17:00:46,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/684f2ee24/3e13e36bffaa48e28e60d09378f145af/FLAG58268ef46 [2021-12-14 17:00:46,584 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:00:46,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-14 17:00:46,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/684f2ee24/3e13e36bffaa48e28e60d09378f145af/FLAG58268ef46 [2021-12-14 17:00:46,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/684f2ee24/3e13e36bffaa48e28e60d09378f145af [2021-12-14 17:00:46,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:00:46,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:00:46,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:00:46,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:00:46,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:00:46,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:00:46" (1/1) ... [2021-12-14 17:00:46,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f979fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:46, skipping insertion in model container [2021-12-14 17:00:46,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:00:46" (1/1) ... [2021-12-14 17:00:46,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:00:46,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:00:47,223 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_append_harness.i[4493,4506] [2021-12-14 17:00:47,227 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_append_harness.i[4553,4566] [2021-12-14 17:00:47,726 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,728 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,737 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,742 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:47,743 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,013 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:00:48,014 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:00:48,015 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:00:48,016 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:00:48,017 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:00:48,019 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:00:48,020 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:00:48,021 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:00:48,021 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:00:48,022 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:00:48,205 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:00:48,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:00:48,397 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:00:48,418 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_append_harness.i[4493,4506] [2021-12-14 17:00:48,420 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_append_harness.i[4553,4566] [2021-12-14 17:00:48,445 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,445 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,446 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,446 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,446 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,498 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:00:48,499 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:00:48,499 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:00:48,502 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:00:48,502 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:00:48,502 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:00:48,503 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:00:48,503 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:00:48,503 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:00:48,504 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:00:48,520 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:00:48,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:00:48,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:00:48,766 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:00:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48 WrapperNode [2021-12-14 17:00:48,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:00:48,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:00:48,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:00:48,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:00:48,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:48,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:48,941 INFO L137 Inliner]: procedures = 691, calls = 2643, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 859 [2021-12-14 17:00:48,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:00:48,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:00:48,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:00:48,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:00:48,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:48,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:48,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:48,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:49,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:49,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:49,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:49,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:00:49,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:00:49,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:00:49,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:00:49,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (1/1) ... [2021-12-14 17:00:49,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:00:49,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:00:49,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:00:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:00:49,127 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-14 17:00:49,128 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-14 17:00:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-14 17:00:49,128 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-14 17:00:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:00:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:00:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:00:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_append [2021-12-14 17:00:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_append [2021-12-14 17:00:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:00:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-14 17:00:49,130 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-14 17:00:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:00:49,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:00:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:00:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:00:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:00:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-14 17:00:49,131 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-14 17:00:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:00:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:00:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:00:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:00:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:00:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:00:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-14 17:00:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-14 17:00:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:00:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:00:49,134 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-12-14 17:00:49,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:00:49,134 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:00:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:00:49,426 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:00:49,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:00:50,173 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:00:50,180 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:00:50,180 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:00:50,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:00:50 BoogieIcfgContainer [2021-12-14 17:00:50,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:00:50,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:00:50,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:00:50,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:00:50,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:00:46" (1/3) ... [2021-12-14 17:00:50,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272e2f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:00:50, skipping insertion in model container [2021-12-14 17:00:50,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:48" (2/3) ... [2021-12-14 17:00:50,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272e2f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:00:50, skipping insertion in model container [2021-12-14 17:00:50,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:00:50" (3/3) ... [2021-12-14 17:00:50,188 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_harness.i [2021-12-14 17:00:50,196 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:00:50,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:00:50,234 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:00:50,243 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:00:50,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:00:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-14 17:00:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-14 17:00:50,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:50,270 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-14 17:00:50,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1617698357, now seen corresponding path program 1 times [2021-12-14 17:00:50,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:50,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401572230] [2021-12-14 17:00:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:50,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:00:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:00:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:00:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:00:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:00:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:00:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:00:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:00:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:00:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:00:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:00:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:00:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:00:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:00:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-14 17:00:50,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:00:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401572230] [2021-12-14 17:00:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401572230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:00:50,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:00:50,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 17:00:50,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664416064] [2021-12-14 17:00:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:00:50,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:00:50,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:00:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:00:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:00:50,786 INFO L87 Difference]: Start difference. First operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:00:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:00:51,020 INFO L93 Difference]: Finished difference Result 336 states and 480 transitions. [2021-12-14 17:00:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:00:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2021-12-14 17:00:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:00:51,030 INFO L225 Difference]: With dead ends: 336 [2021-12-14 17:00:51,031 INFO L226 Difference]: Without dead ends: 165 [2021-12-14 17:00:51,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 17:00:51,042 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:00:51,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 229 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:00:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-14 17:00:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-14 17:00:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-14 17:00:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2021-12-14 17:00:51,092 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 97 [2021-12-14 17:00:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:00:51,092 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2021-12-14 17:00:51,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:00:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2021-12-14 17:00:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-14 17:00:51,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:51,097 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-14 17:00:51,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:00:51,097 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -369216981, now seen corresponding path program 1 times [2021-12-14 17:00:51,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:51,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58178048] [2021-12-14 17:00:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:51,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:00:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:00:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:00:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:00:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:00:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:00:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:00:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:00:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:00:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:00:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:00:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:00:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:00:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:00:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:00:51,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:00:51,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58178048] [2021-12-14 17:00:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58178048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:00:51,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048861253] [2021-12-14 17:00:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:51,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:00:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:00:51,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:00:51,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:00:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:00:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:00:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 17:00:52,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:00:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:00:52,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048861253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:00:52,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:00:52,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-14 17:00:52,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737912985] [2021-12-14 17:00:52,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:00:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:00:52,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:00:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:00:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:00:52,394 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-14 17:00:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:00:53,125 INFO L93 Difference]: Finished difference Result 319 states and 428 transitions. [2021-12-14 17:00:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:00:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) Word has length 97 [2021-12-14 17:00:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:00:53,130 INFO L225 Difference]: With dead ends: 319 [2021-12-14 17:00:53,130 INFO L226 Difference]: Without dead ends: 171 [2021-12-14 17:00:53,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:00:53,132 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 286 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:00:53,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 528 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:00:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-14 17:00:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-14 17:00:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 110 states have internal predecessors, (127), 48 states have call successors, (48), 13 states have call predecessors, (48), 15 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-14 17:00:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2021-12-14 17:00:53,146 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 97 [2021-12-14 17:00:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:00:53,146 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2021-12-14 17:00:53,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-14 17:00:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2021-12-14 17:00:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:00:53,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:53,149 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-14 17:00:53,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:00:53,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:00:53,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2066662021, now seen corresponding path program 1 times [2021-12-14 17:00:53,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374712616] [2021-12-14 17:00:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:53,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:00:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:00:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:00:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:00:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:00:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:00:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:00:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:00:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:00:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:00:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:00:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:00:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:00:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:00:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:00:53,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:00:53,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374712616] [2021-12-14 17:00:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374712616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:00:53,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:00:53,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:00:53,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408121880] [2021-12-14 17:00:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:00:53,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:00:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:00:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:00:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:00:53,655 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-14 17:00:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:00:54,282 INFO L93 Difference]: Finished difference Result 300 states and 401 transitions. [2021-12-14 17:00:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:00:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 105 [2021-12-14 17:00:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:00:54,284 INFO L225 Difference]: With dead ends: 300 [2021-12-14 17:00:54,288 INFO L226 Difference]: Without dead ends: 168 [2021-12-14 17:00:54,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:00:54,290 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 160 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:00:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 527 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:00:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-14 17:00:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-14 17:00:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-14 17:00:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2021-12-14 17:00:54,306 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 105 [2021-12-14 17:00:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:00:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2021-12-14 17:00:54,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-14 17:00:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2021-12-14 17:00:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 17:00:54,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:54,317 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-14 17:00:54,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:00:54,317 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813690, now seen corresponding path program 1 times [2021-12-14 17:00:54,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211730248] [2021-12-14 17:00:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:54,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:00:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:00:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:00:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:00:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:00:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:00:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:00:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:00:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:00:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:00:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:00:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:00:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:00:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:00:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:00:54,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:00:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211730248] [2021-12-14 17:00:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211730248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:00:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569562950] [2021-12-14 17:00:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:54,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:00:54,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:00:54,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:00:54,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:00:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:00:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:00:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:00:55,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:00:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:00:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569562950] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 17:00:55,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:00:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 21 [2021-12-14 17:00:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356953981] [2021-12-14 17:00:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:00:55,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:00:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:00:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:00:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:00:55,658 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:00:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:00:55,882 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2021-12-14 17:00:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:00:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 111 [2021-12-14 17:00:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:00:55,884 INFO L225 Difference]: With dead ends: 291 [2021-12-14 17:00:55,884 INFO L226 Difference]: Without dead ends: 165 [2021-12-14 17:00:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:00:55,885 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 230 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:00:55,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 954 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:00:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-14 17:00:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-14 17:00:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.174757281553398) internal successors, (121), 104 states have internal predecessors, (121), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-14 17:00:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2021-12-14 17:00:55,897 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 111 [2021-12-14 17:00:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:00:55,897 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2021-12-14 17:00:55,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:00:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2021-12-14 17:00:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 17:00:55,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:55,899 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:00:55,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:00:56,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-14 17:00:56,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1770709749, now seen corresponding path program 1 times [2021-12-14 17:00:56,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209722021] [2021-12-14 17:00:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:56,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:00:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:00:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:00:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:00:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:00:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:00:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:00:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:00:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:00:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:00:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:00:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:00:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:00:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:00:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:00:56,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:00:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209722021] [2021-12-14 17:00:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209722021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:00:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910274774] [2021-12-14 17:00:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:56,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:00:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:00:56,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:00:56,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:00:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:00:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 17:00:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:00:57,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-14 17:00:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 17:00:57,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:00:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-14 17:00:57,876 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:00:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-14 17:00:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:00:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910274774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:00:57,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:00:57,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2021-12-14 17:00:57,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763342835] [2021-12-14 17:00:57,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:00:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 17:00:57,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:00:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 17:00:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:00:57,958 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-14 17:00:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:00:59,547 INFO L93 Difference]: Finished difference Result 352 states and 469 transitions. [2021-12-14 17:00:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 17:00:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 113 [2021-12-14 17:00:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:00:59,550 INFO L225 Difference]: With dead ends: 352 [2021-12-14 17:00:59,550 INFO L226 Difference]: Without dead ends: 236 [2021-12-14 17:00:59,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 236 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 17:00:59,551 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 188 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:00:59,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 907 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1298 Invalid, 0 Unknown, 426 Unchecked, 1.2s Time] [2021-12-14 17:00:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-14 17:00:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2021-12-14 17:00:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 142 states have (on average 1.176056338028169) internal successors, (167), 143 states have internal predecessors, (167), 61 states have call successors, (61), 17 states have call predecessors, (61), 18 states have return successors, (68), 61 states have call predecessors, (68), 60 states have call successors, (68) [2021-12-14 17:00:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 296 transitions. [2021-12-14 17:00:59,566 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 296 transitions. Word has length 113 [2021-12-14 17:00:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:00:59,566 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 296 transitions. [2021-12-14 17:00:59,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-14 17:00:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 296 transitions. [2021-12-14 17:00:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-14 17:00:59,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:00:59,568 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:00:59,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:00:59,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:00:59,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:00:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:00:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1925736603, now seen corresponding path program 1 times [2021-12-14 17:00:59,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:00:59,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928650772] [2021-12-14 17:00:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:00:59,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:00:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:01:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:01:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:01:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:01:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:01:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 17:01:00,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928650772] [2021-12-14 17:01:00,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928650772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:00,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983412025] [2021-12-14 17:01:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:00,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:00,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:00,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:01:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 17:01:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 17:01:00,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:01:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 17:01:01,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983412025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:01:01,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:01:01,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 20 [2021-12-14 17:01:01,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304414731] [2021-12-14 17:01:01,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:01:01,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:01:01,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:01:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:01:01,490 INFO L87 Difference]: Start difference. First operand 222 states and 296 transitions. Second operand has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-14 17:01:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:02,517 INFO L93 Difference]: Finished difference Result 387 states and 525 transitions. [2021-12-14 17:01:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 17:01:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 121 [2021-12-14 17:01:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:02,519 INFO L225 Difference]: With dead ends: 387 [2021-12-14 17:01:02,520 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 17:01:02,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:01:02,521 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 123 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:02,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1582 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 17:01:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 17:01:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 227. [2021-12-14 17:01:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.1712328767123288) internal successors, (171), 148 states have internal predecessors, (171), 61 states have call successors, (61), 17 states have call predecessors, (61), 19 states have return successors, (74), 61 states have call predecessors, (74), 60 states have call successors, (74) [2021-12-14 17:01:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 306 transitions. [2021-12-14 17:01:02,542 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 306 transitions. Word has length 121 [2021-12-14 17:01:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:02,543 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 306 transitions. [2021-12-14 17:01:02,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-14 17:01:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 306 transitions. [2021-12-14 17:01:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 17:01:02,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:02,545 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:02,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:02,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:02,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash -508813440, now seen corresponding path program 1 times [2021-12-14 17:01:02,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:02,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495880395] [2021-12-14 17:01:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:02,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:02,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:02,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:02,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:01:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:01:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:01:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 17:01:03,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495880395] [2021-12-14 17:01:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495880395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:03,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:01:03,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:01:03,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593789963] [2021-12-14 17:01:03,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:03,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:01:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:01:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:01:03,156 INFO L87 Difference]: Start difference. First operand 227 states and 306 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:03,621 INFO L93 Difference]: Finished difference Result 372 states and 502 transitions. [2021-12-14 17:01:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:01:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2021-12-14 17:01:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:03,623 INFO L225 Difference]: With dead ends: 372 [2021-12-14 17:01:03,623 INFO L226 Difference]: Without dead ends: 227 [2021-12-14 17:01:03,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:01:03,624 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 101 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:03,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 892 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:01:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-14 17:01:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-14 17:01:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.1712328767123288) internal successors, (171), 148 states have internal predecessors, (171), 61 states have call successors, (61), 17 states have call predecessors, (61), 19 states have return successors, (72), 61 states have call predecessors, (72), 60 states have call successors, (72) [2021-12-14 17:01:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 304 transitions. [2021-12-14 17:01:03,653 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 304 transitions. Word has length 123 [2021-12-14 17:01:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 304 transitions. [2021-12-14 17:01:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 304 transitions. [2021-12-14 17:01:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 17:01:03,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:03,655 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-14 17:01:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:01:03,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1642823079, now seen corresponding path program 1 times [2021-12-14 17:01:03,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:03,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391711396] [2021-12-14 17:01:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:01:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:01:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:01:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:01:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:01:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-14 17:01:03,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391711396] [2021-12-14 17:01:03,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391711396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:03,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:01:03,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:01:03,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421440180] [2021-12-14 17:01:03,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:03,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:01:03,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:01:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:01:03,911 INFO L87 Difference]: Start difference. First operand 227 states and 304 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:01:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:04,449 INFO L93 Difference]: Finished difference Result 245 states and 328 transitions. [2021-12-14 17:01:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:01:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-12-14 17:01:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:04,450 INFO L225 Difference]: With dead ends: 245 [2021-12-14 17:01:04,451 INFO L226 Difference]: Without dead ends: 243 [2021-12-14 17:01:04,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:01:04,451 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 116 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 812 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:01:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-14 17:01:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-12-14 17:01:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 63 states have call successors, (63), 18 states have call predecessors, (63), 21 states have return successors, (80), 63 states have call predecessors, (80), 62 states have call successors, (80) [2021-12-14 17:01:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-12-14 17:01:04,472 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 125 [2021-12-14 17:01:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:04,472 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-12-14 17:01:04,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-14 17:01:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-12-14 17:01:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 17:01:04,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:04,473 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:04,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:01:04,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash 14294821, now seen corresponding path program 1 times [2021-12-14 17:01:04,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:04,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014430647] [2021-12-14 17:01:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:04,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:01:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:01:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:01:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-14 17:01:04,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014430647] [2021-12-14 17:01:04,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014430647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96853654] [2021-12-14 17:01:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:04,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:04,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:04,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:04,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:01:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 17:01:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:01:05,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96853654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:05,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-12-14 17:01:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469065347] [2021-12-14 17:01:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:05,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:01:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:01:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:01:05,740 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:05,934 INFO L93 Difference]: Finished difference Result 400 states and 553 transitions. [2021-12-14 17:01:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:01:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 125 [2021-12-14 17:01:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:05,938 INFO L225 Difference]: With dead ends: 400 [2021-12-14 17:01:05,938 INFO L226 Difference]: Without dead ends: 237 [2021-12-14 17:01:05,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:01:05,940 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 15 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:05,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 755 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-12-14 17:01:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-14 17:01:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-12-14 17:01:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 155 states have internal predecessors, (176), 63 states have call successors, (63), 18 states have call predecessors, (63), 21 states have return successors, (80), 63 states have call predecessors, (80), 62 states have call successors, (80) [2021-12-14 17:01:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 319 transitions. [2021-12-14 17:01:05,965 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 319 transitions. Word has length 125 [2021-12-14 17:01:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:05,965 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 319 transitions. [2021-12-14 17:01:05,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 319 transitions. [2021-12-14 17:01:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 17:01:05,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:05,966 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:06,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:06,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:06,179 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1113949143, now seen corresponding path program 1 times [2021-12-14 17:01:06,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445821986] [2021-12-14 17:01:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:06,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:01:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:01:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:01:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-14 17:01:06,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445821986] [2021-12-14 17:01:06,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445821986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599526918] [2021-12-14 17:01:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:06,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:06,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:06,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:01:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 17:01:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:07,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:01:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:01:07,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:07,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599526918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:07,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:07,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-14 17:01:07,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944931060] [2021-12-14 17:01:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:07,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:01:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:01:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:01:07,633 INFO L87 Difference]: Start difference. First operand 237 states and 319 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:01:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:07,729 INFO L93 Difference]: Finished difference Result 468 states and 629 transitions. [2021-12-14 17:01:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:01:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 125 [2021-12-14 17:01:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:07,731 INFO L225 Difference]: With dead ends: 468 [2021-12-14 17:01:07,731 INFO L226 Difference]: Without dead ends: 244 [2021-12-14 17:01:07,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:01:07,732 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 62 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:07,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1095 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 80 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2021-12-14 17:01:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-14 17:01:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-12-14 17:01:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 159 states have (on average 1.1635220125786163) internal successors, (185), 161 states have internal predecessors, (185), 63 states have call successors, (63), 19 states have call predecessors, (63), 21 states have return successors, (80), 63 states have call predecessors, (80), 62 states have call successors, (80) [2021-12-14 17:01:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 328 transitions. [2021-12-14 17:01:07,744 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 328 transitions. Word has length 125 [2021-12-14 17:01:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 328 transitions. [2021-12-14 17:01:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:01:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 328 transitions. [2021-12-14 17:01:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 17:01:07,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:07,746 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:07,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:07,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:07,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1997458133, now seen corresponding path program 1 times [2021-12-14 17:01:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598622095] [2021-12-14 17:01:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:07,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:01:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:01:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:01:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:01:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:01:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:01:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-14 17:01:08,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598622095] [2021-12-14 17:01:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598622095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563172226] [2021-12-14 17:01:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:08,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:08,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:08,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:01:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:01:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:01:09,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:09,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563172226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:09,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:09,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:01:09,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951959440] [2021-12-14 17:01:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:09,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:01:09,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:01:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:01:09,153 INFO L87 Difference]: Start difference. First operand 244 states and 328 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:09,206 INFO L93 Difference]: Finished difference Result 484 states and 661 transitions. [2021-12-14 17:01:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:01:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 125 [2021-12-14 17:01:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:09,225 INFO L225 Difference]: With dead ends: 484 [2021-12-14 17:01:09,225 INFO L226 Difference]: Without dead ends: 264 [2021-12-14 17:01:09,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:01:09,228 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 20 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 637 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 [2021-12-14 17:01:09,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 637 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:01:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-14 17:01:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 246. [2021-12-14 17:01:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 161 states have (on average 1.1614906832298137) internal successors, (187), 163 states have internal predecessors, (187), 63 states have call successors, (63), 19 states have call predecessors, (63), 21 states have return successors, (79), 63 states have call predecessors, (79), 62 states have call successors, (79) [2021-12-14 17:01:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 329 transitions. [2021-12-14 17:01:09,267 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 329 transitions. Word has length 125 [2021-12-14 17:01:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:09,267 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 329 transitions. [2021-12-14 17:01:09,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 329 transitions. [2021-12-14 17:01:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:01:09,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:09,270 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:09,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:09,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:09,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 265733617, now seen corresponding path program 1 times [2021-12-14 17:01:09,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74428659] [2021-12-14 17:01:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:09,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:01:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:01:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:01:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:01:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:01:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:01:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:01:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:01:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:01:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 17:01:09,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74428659] [2021-12-14 17:01:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74428659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040045667] [2021-12-14 17:01:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:09,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:09,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:09,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:10,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:01:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:01:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:01:10,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:10,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040045667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:10,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:10,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-14 17:01:10,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469064944] [2021-12-14 17:01:10,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:10,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:01:10,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:01:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:01:10,752 INFO L87 Difference]: Start difference. First operand 246 states and 329 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:10,921 INFO L93 Difference]: Finished difference Result 510 states and 699 transitions. [2021-12-14 17:01:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:01:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2021-12-14 17:01:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:10,923 INFO L225 Difference]: With dead ends: 510 [2021-12-14 17:01:10,923 INFO L226 Difference]: Without dead ends: 286 [2021-12-14 17:01:10,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:01:10,924 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 42 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:10,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 748 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-14 17:01:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-14 17:01:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-12-14 17:01:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 177 states have (on average 1.1751412429378532) internal successors, (208), 179 states have internal predecessors, (208), 63 states have call successors, (63), 19 states have call predecessors, (63), 21 states have return successors, (79), 63 states have call predecessors, (79), 62 states have call successors, (79) [2021-12-14 17:01:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 350 transitions. [2021-12-14 17:01:10,953 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 350 transitions. Word has length 129 [2021-12-14 17:01:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:10,953 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 350 transitions. [2021-12-14 17:01:10,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 350 transitions. [2021-12-14 17:01:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:01:10,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:10,956 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:10,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:11,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:01:11,177 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:11,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1353241297, now seen corresponding path program 1 times [2021-12-14 17:01:11,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:11,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198676940] [2021-12-14 17:01:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:11,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:01:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:01:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:01:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:01:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:01:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:01:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:01:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:01:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:01:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-14 17:01:11,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198676940] [2021-12-14 17:01:11,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198676940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530505465] [2021-12-14 17:01:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:11,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:11,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:11,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:11,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:01:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 17:01:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:01:12,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:12,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530505465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:12,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:12,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:01:12,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208885665] [2021-12-14 17:01:12,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:12,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:01:12,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:01:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:01:12,185 INFO L87 Difference]: Start difference. First operand 262 states and 350 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:01:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:12,292 INFO L93 Difference]: Finished difference Result 510 states and 683 transitions. [2021-12-14 17:01:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:01:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 129 [2021-12-14 17:01:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:12,295 INFO L225 Difference]: With dead ends: 510 [2021-12-14 17:01:12,295 INFO L226 Difference]: Without dead ends: 272 [2021-12-14 17:01:12,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:01:12,298 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 12 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:12,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1588 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:01:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-14 17:01:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2021-12-14 17:01:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 181 states have (on average 1.171270718232044) internal successors, (212), 184 states have internal predecessors, (212), 63 states have call successors, (63), 19 states have call predecessors, (63), 22 states have return successors, (84), 63 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-14 17:01:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 359 transitions. [2021-12-14 17:01:12,307 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 359 transitions. Word has length 129 [2021-12-14 17:01:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:12,308 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 359 transitions. [2021-12-14 17:01:12,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 17:01:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 359 transitions. [2021-12-14 17:01:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 17:01:12,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:12,309 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:12,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:12,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:01:12,526 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 498704820, now seen corresponding path program 1 times [2021-12-14 17:01:12,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:12,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377235590] [2021-12-14 17:01:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:12,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:01:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:01:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:01:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:01:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 17:01:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-14 17:01:12,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377235590] [2021-12-14 17:01:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377235590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572606258] [2021-12-14 17:01:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:12,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:12,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:12,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:01:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:01:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:01:13,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572606258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:13,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:01:13,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028048650] [2021-12-14 17:01:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:13,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:01:13,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:01:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:01:13,291 INFO L87 Difference]: Start difference. First operand 267 states and 359 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:13,344 INFO L93 Difference]: Finished difference Result 523 states and 711 transitions. [2021-12-14 17:01:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:01:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-14 17:01:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:13,348 INFO L225 Difference]: With dead ends: 523 [2021-12-14 17:01:13,348 INFO L226 Difference]: Without dead ends: 278 [2021-12-14 17:01:13,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:01:13,349 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 9 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 630 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 [2021-12-14 17:01:13,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 630 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:01:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-14 17:01:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 269. [2021-12-14 17:01:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 183 states have (on average 1.1584699453551912) internal successors, (212), 186 states have internal predecessors, (212), 63 states have call successors, (63), 19 states have call predecessors, (63), 22 states have return successors, (84), 63 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-14 17:01:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 359 transitions. [2021-12-14 17:01:13,378 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 359 transitions. Word has length 131 [2021-12-14 17:01:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:13,379 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 359 transitions. [2021-12-14 17:01:13,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 359 transitions. [2021-12-14 17:01:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 17:01:13,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:13,380 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:13,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:13,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 17:01:13,607 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 248293624, now seen corresponding path program 1 times [2021-12-14 17:01:13,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144737367] [2021-12-14 17:01:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:13,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:01:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:01:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:01:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:01:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 17:01:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-14 17:01:13,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144737367] [2021-12-14 17:01:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144737367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776617804] [2021-12-14 17:01:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:13,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:13,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:13,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:01:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:01:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 17:01:14,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:14,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776617804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:14,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:14,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:01:14,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445675576] [2021-12-14 17:01:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:01:14,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:01:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:01:14,585 INFO L87 Difference]: Start difference. First operand 269 states and 359 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:14,610 INFO L93 Difference]: Finished difference Result 534 states and 726 transitions. [2021-12-14 17:01:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:01:14,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-14 17:01:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:14,613 INFO L225 Difference]: With dead ends: 534 [2021-12-14 17:01:14,613 INFO L226 Difference]: Without dead ends: 287 [2021-12-14 17:01:14,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:01:14,617 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 34 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 628 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 [2021-12-14 17:01:14,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 628 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:01:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-14 17:01:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 263. [2021-12-14 17:01:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 177 states have (on average 1.1355932203389831) internal successors, (201), 180 states have internal predecessors, (201), 63 states have call successors, (63), 19 states have call predecessors, (63), 22 states have return successors, (84), 63 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-14 17:01:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 348 transitions. [2021-12-14 17:01:14,629 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 348 transitions. Word has length 131 [2021-12-14 17:01:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:14,629 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 348 transitions. [2021-12-14 17:01:14,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 348 transitions. [2021-12-14 17:01:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 17:01:14,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:14,631 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:14,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:14,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:01:14,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1279334522, now seen corresponding path program 1 times [2021-12-14 17:01:14,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995609639] [2021-12-14 17:01:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:14,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:01:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:01:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:01:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:01:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 17:01:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-14 17:01:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995609639] [2021-12-14 17:01:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995609639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480655974] [2021-12-14 17:01:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:15,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:15,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:15,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:01:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 17:01:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:15,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:01:15,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:01:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 17:01:16,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:16,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480655974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:16,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:16,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2021-12-14 17:01:16,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219464904] [2021-12-14 17:01:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:16,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:01:16,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:01:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:01:16,380 INFO L87 Difference]: Start difference. First operand 263 states and 348 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:01:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:16,522 INFO L93 Difference]: Finished difference Result 494 states and 666 transitions. [2021-12-14 17:01:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:01:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 131 [2021-12-14 17:01:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:16,524 INFO L225 Difference]: With dead ends: 494 [2021-12-14 17:01:16,524 INFO L226 Difference]: Without dead ends: 303 [2021-12-14 17:01:16,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:01:16,526 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 34 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:16,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1470 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-12-14 17:01:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-14 17:01:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 276. [2021-12-14 17:01:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 188 states have (on average 1.1329787234042554) internal successors, (213), 192 states have internal predecessors, (213), 64 states have call successors, (64), 20 states have call predecessors, (64), 23 states have return successors, (86), 63 states have call predecessors, (86), 63 states have call successors, (86) [2021-12-14 17:01:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 363 transitions. [2021-12-14 17:01:16,537 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 363 transitions. Word has length 131 [2021-12-14 17:01:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:16,537 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 363 transitions. [2021-12-14 17:01:16,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:01:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 363 transitions. [2021-12-14 17:01:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 17:01:16,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:16,539 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:16,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:16,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 17:01:16,756 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1958606776, now seen corresponding path program 1 times [2021-12-14 17:01:16,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:16,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571244462] [2021-12-14 17:01:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:16,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:01:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:01:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:01:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:01:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 17:01:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 17:01:17,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571244462] [2021-12-14 17:01:17,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571244462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022943441] [2021-12-14 17:01:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:17,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:17,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:01:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:01:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-14 17:01:17,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:01:17,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022943441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:01:17,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:01:17,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:01:17,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051481068] [2021-12-14 17:01:17,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:01:17,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:01:17,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:01:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:01:17,790 INFO L87 Difference]: Start difference. First operand 276 states and 363 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:17,813 INFO L93 Difference]: Finished difference Result 458 states and 619 transitions. [2021-12-14 17:01:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:01:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-14 17:01:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:17,816 INFO L225 Difference]: With dead ends: 458 [2021-12-14 17:01:17,816 INFO L226 Difference]: Without dead ends: 278 [2021-12-14 17:01:17,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:01:17,817 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:17,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 636 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:01:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-14 17:01:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2021-12-14 17:01:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 191 states have internal predecessors, (211), 64 states have call successors, (64), 20 states have call predecessors, (64), 23 states have return successors, (85), 63 states have call predecessors, (85), 63 states have call successors, (85) [2021-12-14 17:01:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 360 transitions. [2021-12-14 17:01:17,828 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 360 transitions. Word has length 131 [2021-12-14 17:01:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:17,829 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 360 transitions. [2021-12-14 17:01:17,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:01:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 360 transitions. [2021-12-14 17:01:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-14 17:01:17,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:17,831 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:17,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 17:01:18,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 977222971, now seen corresponding path program 1 times [2021-12-14 17:01:18,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397152263] [2021-12-14 17:01:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:18,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:01:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:01:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:01:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:01:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:01:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:01:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 17:01:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 17:01:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-14 17:01:18,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397152263] [2021-12-14 17:01:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397152263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480968147] [2021-12-14 17:01:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:18,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:18,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:18,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:18,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:01:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 17:01:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-14 17:01:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:01:20,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:01:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-14 17:01:20,331 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:01:20,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-12-14 17:01:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-14 17:01:20,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480968147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:01:20,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:01:20,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 22 [2021-12-14 17:01:20,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362204322] [2021-12-14 17:01:20,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:01:20,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 17:01:20,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:01:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 17:01:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:01:20,400 INFO L87 Difference]: Start difference. First operand 275 states and 360 transitions. Second operand has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 19 states have internal predecessors, (134), 9 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-14 17:01:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:01:22,343 INFO L93 Difference]: Finished difference Result 516 states and 685 transitions. [2021-12-14 17:01:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 17:01:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 19 states have internal predecessors, (134), 9 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) Word has length 152 [2021-12-14 17:01:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:01:22,346 INFO L225 Difference]: With dead ends: 516 [2021-12-14 17:01:22,346 INFO L226 Difference]: Without dead ends: 371 [2021-12-14 17:01:22,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 321 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 17:01:22,348 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 195 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:01:22,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1365 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2407 Invalid, 0 Unknown, 489 Unchecked, 1.5s Time] [2021-12-14 17:01:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-14 17:01:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 303. [2021-12-14 17:01:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 208 states have (on average 1.1298076923076923) internal successors, (235), 211 states have internal predecessors, (235), 69 states have call successors, (69), 23 states have call predecessors, (69), 25 states have return successors, (92), 68 states have call predecessors, (92), 68 states have call successors, (92) [2021-12-14 17:01:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 396 transitions. [2021-12-14 17:01:22,360 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 396 transitions. Word has length 152 [2021-12-14 17:01:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:01:22,360 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 396 transitions. [2021-12-14 17:01:22,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.380952380952381) internal successors, (134), 19 states have internal predecessors, (134), 9 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-14 17:01:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 396 transitions. [2021-12-14 17:01:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 17:01:22,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:01:22,362 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:01:22,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:01:22,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:22,575 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:01:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:01:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1502859134, now seen corresponding path program 1 times [2021-12-14 17:01:22,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:01:22,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314195849] [2021-12-14 17:01:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:22,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:01:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:01:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:01:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 17:01:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:01:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 17:01:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:01:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:01:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:01:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:01:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:01:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:22,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:01:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:01:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:01:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:01:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:01:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-14 17:01:23,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:01:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314195849] [2021-12-14 17:01:23,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314195849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:01:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934143157] [2021-12-14 17:01:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:01:23,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:01:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:01:23,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:01:23,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:01:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:01:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-14 17:01:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:01:23,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:01:23,786 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-14 17:01:23,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-14 17:01:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:01:24,324 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-14 17:01:24,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-14 17:01:33,936 INFO L388 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 23