./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 807baa6191d907795e80ff5436f6f636b6dbcf7109bdc782ca0ac1b857ff64f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:44:05,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:44:05,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:44:05,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:44:05,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:44:05,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:44:05,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:44:05,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:44:05,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:44:05,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:44:05,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:44:05,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:44:05,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:44:05,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:44:05,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:44:05,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:44:05,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:44:05,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:44:05,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:44:05,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:44:05,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:44:05,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:44:05,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:44:05,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:44:05,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:44:05,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:44:05,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:44:05,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:44:05,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:44:05,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:44:05,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:44:05,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:44:05,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:44:05,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:44:05,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:44:05,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:44:05,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:44:05,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:44:05,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:44:05,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:44:05,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:44:05,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:44:05,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:44:05,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:44:05,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:44:05,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:44:05,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:44:05,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:44:05,717 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:44:05,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:44:05,717 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:44:05,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:44:05,719 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:44:05,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:44:05,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:44:05,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:44:05,720 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:44:05,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:44:05,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:44:05,721 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:44:05,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:44:05,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:44:05,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:44:05,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:44:05,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:44:05,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:44:05,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:44:05,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:44:05,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:44:05,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:44:05,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:44:05,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:05,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:44:05,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:44:05,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:44:05,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:44:05,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:44:05,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:44:05,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:44:05,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:44:05,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 807baa6191d907795e80ff5436f6f636b6dbcf7109bdc782ca0ac1b857ff64f7 [2021-11-23 02:44:06,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:44:06,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:44:06,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:44:06,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:44:06,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:44:06,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-23 02:44:06,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/data/5e775d90c/3d985ed92fdc4764a4090eb8e84532bf/FLAG7200fd980 [2021-11-23 02:44:07,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:44:07,303 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-23 02:44:07,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/data/5e775d90c/3d985ed92fdc4764a4090eb8e84532bf/FLAG7200fd980 [2021-11-23 02:44:07,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/data/5e775d90c/3d985ed92fdc4764a4090eb8e84532bf [2021-11-23 02:44:07,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:44:07,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:44:07,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:07,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:44:07,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:44:07,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:07" (1/1) ... [2021-11-23 02:44:07,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a398e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:07, skipping insertion in model container [2021-11-23 02:44:07,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:07" (1/1) ... [2021-11-23 02:44:07,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:44:07,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:44:13,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513173,513186] [2021-11-23 02:44:13,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513320,513333] [2021-11-23 02:44:14,011 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513459,513472] [2021-11-23 02:44:14,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513617,513630] [2021-11-23 02:44:14,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:14,203 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:44:14,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513173,513186] [2021-11-23 02:44:14,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513320,513333] [2021-11-23 02:44:14,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513459,513472] [2021-11-23 02:44:14,999 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513617,513630] [2021-11-23 02:44:15,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:15,370 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:44:15,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15 WrapperNode [2021-11-23 02:44:15,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:15,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:15,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:44:15,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:44:15,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:15,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,022 INFO L137 Inliner]: procedures = 619, calls = 4098, calls flagged for inlining = 350, calls inlined = 330, statements flattened = 9859 [2021-11-23 02:44:16,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:16,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:44:16,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:44:16,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:44:16,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:44:16,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:44:16,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:44:16,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:44:16,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (1/1) ... [2021-11-23 02:44:16,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:16,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:44:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:44:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2021-11-23 02:44:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2021-11-23 02:44:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:44:16,791 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:44:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:44:16,791 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:44:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_0_6 [2021-11-23 02:44:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_0_6 [2021-11-23 02:44:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_rx_irq [2021-11-23 02:44:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_rx_irq [2021-11-23 02:44:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_setup_rx_resources [2021-11-23 02:44:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_setup_rx_resources [2021-11-23 02:44:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:44:16,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:44:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_tx_ctxtdesc [2021-11-23 02:44:16,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_tx_ctxtdesc [2021-11-23 02:44:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure skb_header_pointer [2021-11-23 02:44:16,794 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_header_pointer [2021-11-23 02:44:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:44:16,794 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:44:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_eitr [2021-11-23 02:44:16,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_eitr [2021-11-23 02:44:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2021-11-23 02:44:16,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2021-11-23 02:44:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_uc_addr_vf [2021-11-23 02:44:16,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_uc_addr_vf [2021-11-23 02:44:16,796 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-23 02:44:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-23 02:44:16,796 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:44:16,796 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:44:16,796 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:44:16,797 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:44:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~bool~0~TO~~s32~0 [2021-11-23 02:44:16,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~bool~0~TO~~s32~0 [2021-11-23 02:44:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:44:16,797 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:44:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_desc_unused [2021-11-23 02:44:16,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_desc_unused [2021-11-23 02:44:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_poll_for_ack [2021-11-23 02:44:16,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_poll_for_ack [2021-11-23 02:44:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_setup_tx_resources [2021-11-23 02:44:16,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_setup_tx_resources [2021-11-23 02:44:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_remove [2021-11-23 02:44:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_remove [2021-11-23 02:44:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:44:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:44:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:44:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:44:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:44:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:44:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:44:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:44:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:44:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:44:16,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:44:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:44:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-23 02:44:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-23 02:44:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:44:16,804 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:44:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:44:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_resume [2021-11-23 02:44:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_resume [2021-11-23 02:44:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-23 02:44:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-23 02:44:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2021-11-23 02:44:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2021-11-23 02:44:16,806 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-23 02:44:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-23 02:44:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_mbx_vf [2021-11-23 02:44:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_mbx_vf [2021-11-23 02:44:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_posted_mbx [2021-11-23 02:44:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_posted_mbx [2021-11-23 02:44:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_mbx_vf [2021-11-23 02:44:16,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_mbx_vf [2021-11-23 02:44:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:44:16,808 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:44:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-23 02:44:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-23 02:44:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:44:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reinit_locked [2021-11-23 02:44:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reinit_locked [2021-11-23 02:44:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_up [2021-11-23 02:44:16,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_up [2021-11-23 02:44:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2021-11-23 02:44:16,811 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2021-11-23 02:44:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:44:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:44:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:44:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:44:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_irq [2021-11-23 02:44:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_irq [2021-11-23 02:44:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_rar_vf [2021-11-23 02:44:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_rar_vf [2021-11-23 02:44:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:44:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:44:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:44:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header_len [2021-11-23 02:44:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header_len [2021-11-23 02:44:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:44:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:44:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:44:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_vfta_vf [2021-11-23 02:44:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_vfta_vf [2021-11-23 02:44:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure vzalloc [2021-11-23 02:44:16,818 INFO L138 BoogieDeclarations]: Found implementation of procedure vzalloc [2021-11-23 02:44:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:44:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:44:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_down [2021-11-23 02:44:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_down [2021-11-23 02:44:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:44:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:44:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-23 02:44:16,823 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-23 02:44:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:44:16,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:44:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure map_vector_to_txq [2021-11-23 02:44:16,831 INFO L138 BoogieDeclarations]: Found implementation of procedure map_vector_to_txq [2021-11-23 02:44:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_offset [2021-11-23 02:44:16,831 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_offset [2021-11-23 02:44:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_all_rx_resources [2021-11-23 02:44:16,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_all_rx_resources [2021-11-23 02:44:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:44:16,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:44:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-23 02:44:16,832 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-23 02:44:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_tx_timeout [2021-11-23 02:44:16,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_tx_timeout [2021-11-23 02:44:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:44:16,833 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:44:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure __udelay [2021-11-23 02:44:16,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __udelay [2021-11-23 02:44:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_negotiate_api [2021-11-23 02:44:16,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_negotiate_api [2021-11-23 02:44:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:44:16,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:44:16,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:44:16,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:44:16,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:44:16,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-23 02:44:16,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-23 02:44:16,835 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_alloc_rx_buffers [2021-11-23 02:44:16,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_alloc_rx_buffers [2021-11-23 02:44:16,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-23 02:44:16,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-23 02:44:16,835 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_interrupt_scheme [2021-11-23 02:44:16,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_interrupt_scheme [2021-11-23 02:44:16,836 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-23 02:44:16,836 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-23 02:44:16,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:44:16,836 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-23 02:44:16,836 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-23 02:44:16,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:44:16,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:44:16,837 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:44:16,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:44:16,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:44:16,837 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:44:16,837 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_tx_resources [2021-11-23 02:44:16,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_tx_resources [2021-11-23 02:44:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_hw_vf [2021-11-23 02:44:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_hw_vf [2021-11-23 02:44:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-23 02:44:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-23 02:44:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_maybe_stop_tx [2021-11-23 02:44:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_maybe_stop_tx [2021-11-23 02:44:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_msg_vf [2021-11-23 02:44:16,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_msg_vf [2021-11-23 02:44:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:44:16,839 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:44:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_busy_poll_recv [2021-11-23 02:44:16,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_busy_poll_recv [2021-11-23 02:44:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_posted_mbx [2021-11-23 02:44:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_posted_mbx [2021-11-23 02:44:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:44:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:44:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-23 02:44:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-23 02:44:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:44:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:44:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_last_counter_stats [2021-11-23 02:44:16,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_last_counter_stats [2021-11-23 02:44:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_io_resume [2021-11-23 02:44:16,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_io_resume [2021-11-23 02:44:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:44:16,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:44:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_up_complete [2021-11-23 02:44:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_up_complete [2021-11-23 02:44:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_bh [2021-11-23 02:44:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_bh [2021-11-23 02:44:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_ivar [2021-11-23 02:44:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_ivar [2021-11-23 02:44:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_bit_vf [2021-11-23 02:44:16,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_bit_vf [2021-11-23 02:44:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:44:16,844 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:44:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:44:16,844 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:44:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_shutdown [2021-11-23 02:44:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_shutdown [2021-11-23 02:44:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset_interrupt_capability [2021-11-23 02:44:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset_interrupt_capability [2021-11-23 02:44:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:44:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:44:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-23 02:44:16,846 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-23 02:44:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_nway_reset [2021-11-23 02:44:16,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_nway_reset [2021-11-23 02:44:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-23 02:44:16,846 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-23 02:44:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_obtain_mbx_lock_vf [2021-11-23 02:44:16,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_obtain_mbx_lock_vf [2021-11-23 02:44:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_tx_ring [2021-11-23 02:44:16,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_tx_ring [2021-11-23 02:44:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_rst_vf [2021-11-23 02:44:16,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_rst_vf [2021-11-23 02:44:16,847 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_v2p_mailbox [2021-11-23 02:44:16,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_v2p_mailbox [2021-11-23 02:44:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:44:16,848 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:44:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_ack_vf [2021-11-23 02:44:16,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_ack_vf [2021-11-23 02:44:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:44:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:44:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:44:16,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:44:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_update_stats [2021-11-23 02:44:16,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_update_stats [2021-11-23 02:44:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:44:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:44:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_irq_enable [2021-11-23 02:44:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_irq_enable [2021-11-23 02:44:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-23 02:44:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-23 02:44:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:44:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:44:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-23 02:44:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_start_hw_vf [2021-11-23 02:44:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_start_hw_vf [2021-11-23 02:44:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-23 02:44:16,857 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-23 02:44:16,858 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-23 02:44:16,858 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-23 02:44:16,858 INFO L130 BoogieDeclarations]: Found specification of procedure napi_hash_del [2021-11-23 02:44:16,858 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_hash_del [2021-11-23 02:44:16,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:44:16,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:44:16,858 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_update_begin [2021-11-23 02:44:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_update_begin [2021-11-23 02:44:16,859 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_all_queues [2021-11-23 02:44:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_all_queues [2021-11-23 02:44:16,859 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_rx_mode [2021-11-23 02:44:16,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_rx_mode [2021-11-23 02:44:16,859 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-23 02:44:16,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-23 02:44:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-23 02:44:16,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-23 02:44:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:44:16,860 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:44:16,860 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~X~~u32~0~TO~~s32~0 [2021-11-23 02:44:16,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~X~~u32~0~TO~~s32~0 [2021-11-23 02:44:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_poll_for_msg [2021-11-23 02:44:16,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_poll_for_msg [2021-11-23 02:44:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_suspend [2021-11-23 02:44:16,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_suspend [2021-11-23 02:44:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-23 02:44:16,861 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-23 02:44:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-23 02:44:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-23 02:44:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:44:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:44:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:44:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:44:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:44:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-23 02:44:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-23 02:44:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:44:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:44:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_link_test [2021-11-23 02:44:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_link_test [2021-11-23 02:44:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:44:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_vlan_rx_add_vid [2021-11-23 02:44:16,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_vlan_rx_add_vid [2021-11-23 02:44:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure map_vector_to_rxq [2021-11-23 02:44:16,864 INFO L138 BoogieDeclarations]: Found implementation of procedure map_vector_to_rxq [2021-11-23 02:44:16,864 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~~bool~0~TO~~s32~0 [2021-11-23 02:44:16,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~~bool~0~TO~~s32~0 [2021-11-23 02:44:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-23 02:44:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-23 02:44:16,865 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-23 02:44:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:44:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_mac_addr_vf [2021-11-23 02:44:16,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_mac_addr_vf [2021-11-23 02:44:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_configure [2021-11-23 02:44:16,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_configure [2021-11-23 02:44:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_all_tx_resources [2021-11-23 02:44:16,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_all_tx_resources [2021-11-23 02:44:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:44:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:44:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-23 02:44:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-23 02:44:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_queues [2021-11-23 02:44:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_queues [2021-11-23 02:44:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:44:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:44:16,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-23 02:44:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-23 02:44:16,868 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_msg_read_ack [2021-11-23 02:44:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_msg_read_ack [2021-11-23 02:44:16,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:44:16,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:44:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:44:16,869 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:44:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:44:16,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:44:16,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:44:16,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:44:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:44:16,870 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:44:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_open [2021-11-23 02:44:16,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_open [2021-11-23 02:44:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-23 02:44:16,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-23 02:44:16,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_ixgbevf_exit_module_17_2 [2021-11-23 02:44:16,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_ixgbevf_exit_module_17_2 [2021-11-23 02:44:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_mac_link_vf [2021-11-23 02:44:16,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_mac_link_vf [2021-11-23 02:44:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clear_interrupt_scheme [2021-11-23 02:44:16,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clear_interrupt_scheme [2021-11-23 02:44:16,871 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_regs_len [2021-11-23 02:44:16,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_regs_len [2021-11-23 02:44:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-23 02:44:16,872 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-23 02:44:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:44:16,872 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:44:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:44:16,873 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:44:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-23 02:44:16,873 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-23 02:44:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_update_mc_addr_list_vf [2021-11-23 02:44:16,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_update_mc_addr_list_vf [2021-11-23 02:44:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_rx_resources [2021-11-23 02:44:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_rx_resources [2021-11-23 02:44:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:44:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:44:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-23 02:44:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-23 02:44:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:44:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:44:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:44:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_mbx_params_vf [2021-11-23 02:44:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_mbx_params_vf [2021-11-23 02:44:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-23 02:44:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-23 02:44:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_q_vectors [2021-11-23 02:44:16,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_q_vectors [2021-11-23 02:44:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:44:16,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:44:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_disable_rx_queue [2021-11-23 02:44:16,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_disable_rx_queue [2021-11-23 02:44:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset [2021-11-23 02:44:16,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset [2021-11-23 02:44:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_close [2021-11-23 02:44:16,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_close [2021-11-23 02:44:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-23 02:44:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-23 02:44:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device_mem [2021-11-23 02:44:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device_mem [2021-11-23 02:44:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_bh [2021-11-23 02:44:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_bh [2021-11-23 02:44:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:44:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:44:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-23 02:44:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-23 02:44:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-23 02:44:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-23 02:44:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure dma_set_mask_and_coherent [2021-11-23 02:44:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_set_mask_and_coherent [2021-11-23 02:44:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdrlen [2021-11-23 02:44:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdrlen [2021-11-23 02:44:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-23 02:44:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-23 02:44:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-23 02:44:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-23 02:44:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:44:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:44:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-23 02:44:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-23 02:44:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:44:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:44:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_rx_ring [2021-11-23 02:44:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_rx_ring [2021-11-23 02:44:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_stop_hw_vf [2021-11-23 02:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_stop_hw_vf [2021-11-23 02:44:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_1_6 [2021-11-23 02:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_1_6 [2021-11-23 02:44:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset_hw_vf [2021-11-23 02:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset_hw_vf [2021-11-23 02:44:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-23 02:44:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-23 02:44:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:44:16,884 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:44:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_unmap_and_free_tx_resource [2021-11-23 02:44:16,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_unmap_and_free_tx_resource [2021-11-23 02:44:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:44:16,884 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-23 02:44:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-23 02:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:44:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:44:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure netpoll_trap [2021-11-23 02:44:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure netpoll_trap [2021-11-23 02:44:18,664 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:44:18,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:44:18,952 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:47:33,589 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:47:33,722 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:47:38,133 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:47:38,133 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-23 02:47:38,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:47:38 BoogieIcfgContainer [2021-11-23 02:47:38,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:47:38,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:47:38,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:47:38,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:47:38,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:07" (1/3) ... [2021-11-23 02:47:38,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e3f772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:47:38, skipping insertion in model container [2021-11-23 02:47:38,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:15" (2/3) ... [2021-11-23 02:47:38,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e3f772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:47:38, skipping insertion in model container [2021-11-23 02:47:38,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:47:38" (3/3) ... [2021-11-23 02:47:38,153 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-23 02:47:38,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:47:38,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:47:38,237 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:47:38,250 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:47:38,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:47:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 2721 states, 1638 states have (on average 1.297924297924298) internal successors, (2126), 1681 states have internal predecessors, (2126), 883 states have call successors, (883), 199 states have call predecessors, (883), 198 states have return successors, (876), 872 states have call predecessors, (876), 876 states have call successors, (876) [2021-11-23 02:47:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-23 02:47:38,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:38,378 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:38,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -707308528, now seen corresponding path program 1 times [2021-11-23 02:47:38,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:38,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161504325] [2021-11-23 02:47:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:38,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2021-11-23 02:47:40,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161504325] [2021-11-23 02:47:40,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161504325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:40,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:40,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:47:40,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208919078] [2021-11-23 02:47:40,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:40,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:47:40,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:47:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:47:40,474 INFO L87 Difference]: Start difference. First operand has 2721 states, 1638 states have (on average 1.297924297924298) internal successors, (2126), 1681 states have internal predecessors, (2126), 883 states have call successors, (883), 199 states have call predecessors, (883), 198 states have return successors, (876), 872 states have call predecessors, (876), 876 states have call successors, (876) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:47:42,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:45,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:52,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:54,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:57,735 INFO L93 Difference]: Finished difference Result 7968 states and 11375 transitions. [2021-11-23 02:47:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:47:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 310 [2021-11-23 02:47:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:57,826 INFO L225 Difference]: With dead ends: 7968 [2021-11-23 02:47:57,826 INFO L226 Difference]: Without dead ends: 5295 [2021-11-23 02:47:57,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:47:57,856 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 3705 mSDsluCounter, 3830 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3705 SdHoareTripleChecker+Valid, 7413 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:57,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3705 Valid, 7413 Invalid, 1155 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 1144 Invalid, 4 Unknown, 0 Unchecked, 16.7s Time] [2021-11-23 02:47:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2021-11-23 02:47:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 5292. [2021-11-23 02:47:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 3200 states have (on average 1.295625) internal successors, (4146), 3284 states have internal predecessors, (4146), 1697 states have call successors, (1697), 394 states have call predecessors, (1697), 393 states have return successors, (1694), 1685 states have call predecessors, (1694), 1694 states have call successors, (1694) [2021-11-23 02:47:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 7537 transitions. [2021-11-23 02:47:58,349 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 7537 transitions. Word has length 310 [2021-11-23 02:47:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 7537 transitions. [2021-11-23 02:47:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:47:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 7537 transitions. [2021-11-23 02:47:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-23 02:47:58,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:58,384 INFO L514 BasicCegarLoop]: trace histogram [31, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:58,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:47:58,389 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -804446787, now seen corresponding path program 1 times [2021-11-23 02:47:58,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917936523] [2021-11-23 02:47:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:58,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2021-11-23 02:47:59,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917936523] [2021-11-23 02:47:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917936523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:59,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:59,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:47:59,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573499413] [2021-11-23 02:47:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:59,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:47:59,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:47:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:47:59,115 INFO L87 Difference]: Start difference. First operand 5292 states and 7537 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-23 02:48:01,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:10,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:12,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:13,426 INFO L93 Difference]: Finished difference Result 14409 states and 20392 transitions. [2021-11-23 02:48:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 326 [2021-11-23 02:48:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:13,511 INFO L225 Difference]: With dead ends: 14409 [2021-11-23 02:48:13,511 INFO L226 Difference]: Without dead ends: 9176 [2021-11-23 02:48:13,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:13,540 INFO L933 BasicCegarLoop]: 3916 mSDtfsCounter, 2720 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 7160 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:13,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 7160 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1178 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 02:48:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9176 states. [2021-11-23 02:48:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9176 to 9163. [2021-11-23 02:48:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9163 states, 5511 states have (on average 1.2874251497005988) internal successors, (7095), 5664 states have internal predecessors, (7095), 2914 states have call successors, (2914), 737 states have call predecessors, (2914), 736 states have return successors, (2913), 2887 states have call predecessors, (2913), 2911 states have call successors, (2913) [2021-11-23 02:48:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 12922 transitions. [2021-11-23 02:48:14,043 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 12922 transitions. Word has length 326 [2021-11-23 02:48:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:14,044 INFO L470 AbstractCegarLoop]: Abstraction has 9163 states and 12922 transitions. [2021-11-23 02:48:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-23 02:48:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 12922 transitions. [2021-11-23 02:48:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-23 02:48:14,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:14,054 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:48:14,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -691802399, now seen corresponding path program 1 times [2021-11-23 02:48:14,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346269928] [2021-11-23 02:48:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2021-11-23 02:48:14,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346269928] [2021-11-23 02:48:14,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346269928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:14,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:14,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:14,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780945530] [2021-11-23 02:48:14,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:14,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:14,696 INFO L87 Difference]: Start difference. First operand 9163 states and 12922 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:48:16,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:22,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:25,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:30,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:32,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:33,623 INFO L93 Difference]: Finished difference Result 16864 states and 23812 transitions. [2021-11-23 02:48:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 324 [2021-11-23 02:48:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:33,686 INFO L225 Difference]: With dead ends: 16864 [2021-11-23 02:48:33,687 INFO L226 Difference]: Without dead ends: 7760 [2021-11-23 02:48:33,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:33,730 INFO L933 BasicCegarLoop]: 4928 mSDtfsCounter, 2745 mSDsluCounter, 3793 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 8172 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:33,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 8172 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1455 Invalid, 4 Unknown, 0 Unchecked, 18.4s Time] [2021-11-23 02:48:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7760 states. [2021-11-23 02:48:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7760 to 7750. [2021-11-23 02:48:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 4726 states have (on average 1.2926364790520524) internal successors, (6109), 4845 states have internal predecessors, (6109), 2407 states have call successors, (2407), 618 states have call predecessors, (2407), 615 states have return successors, (2405), 2378 states have call predecessors, (2405), 2404 states have call successors, (2405) [2021-11-23 02:48:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 10921 transitions. [2021-11-23 02:48:34,175 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 10921 transitions. Word has length 324 [2021-11-23 02:48:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:34,179 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 10921 transitions. [2021-11-23 02:48:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:48:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 10921 transitions. [2021-11-23 02:48:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-23 02:48:34,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:34,195 INFO L514 BasicCegarLoop]: trace histogram [33, 29, 29, 29, 29, 29, 29, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:48:34,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1611800547, now seen corresponding path program 1 times [2021-11-23 02:48:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:34,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45852645] [2021-11-23 02:48:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:34,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3519 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3519 trivial. 0 not checked. [2021-11-23 02:48:34,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45852645] [2021-11-23 02:48:34,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45852645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:34,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:34,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:48:34,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834609441] [2021-11-23 02:48:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:34,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:48:34,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:48:34,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:48:34,999 INFO L87 Difference]: Start difference. First operand 7750 states and 10921 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 02:48:37,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:44,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:50,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:52,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:54,375 INFO L93 Difference]: Finished difference Result 14884 states and 20979 transitions. [2021-11-23 02:48:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:48:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 352 [2021-11-23 02:48:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:54,488 INFO L225 Difference]: With dead ends: 14884 [2021-11-23 02:48:54,488 INFO L226 Difference]: Without dead ends: 14845 [2021-11-23 02:48:54,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:54,504 INFO L933 BasicCegarLoop]: 4256 mSDtfsCounter, 3743 mSDsluCounter, 8610 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 11714 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:54,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3743 Valid, 11714 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1750 Invalid, 4 Unknown, 0 Unchecked, 19.0s Time] [2021-11-23 02:48:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14845 states. [2021-11-23 02:48:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14845 to 14842. [2021-11-23 02:48:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14842 states, 9049 states have (on average 1.2918554536412863) internal successors, (11690), 9272 states have internal predecessors, (11690), 4608 states have call successors, (4608), 1186 states have call predecessors, (4608), 1183 states have return successors, (4607), 4563 states have call predecessors, (4607), 4605 states have call successors, (4607) [2021-11-23 02:48:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14842 states to 14842 states and 20905 transitions. [2021-11-23 02:48:55,482 INFO L78 Accepts]: Start accepts. Automaton has 14842 states and 20905 transitions. Word has length 352 [2021-11-23 02:48:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:55,483 INFO L470 AbstractCegarLoop]: Abstraction has 14842 states and 20905 transitions. [2021-11-23 02:48:55,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 02:48:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14842 states and 20905 transitions. [2021-11-23 02:48:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-23 02:48:55,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:55,502 INFO L514 BasicCegarLoop]: trace histogram [33, 29, 29, 29, 29, 29, 29, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:55,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:48:55,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 27280044, now seen corresponding path program 1 times [2021-11-23 02:48:55,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:55,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60076981] [2021-11-23 02:48:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:55,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3522 trivial. 0 not checked. [2021-11-23 02:48:56,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60076981] [2021-11-23 02:48:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60076981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:56,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:56,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:56,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514776464] [2021-11-23 02:48:56,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:56,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:56,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:56,285 INFO L87 Difference]: Start difference. First operand 14842 states and 20905 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 02:48:58,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:07,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:11,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:13,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:15,620 INFO L93 Difference]: Finished difference Result 34138 states and 48158 transitions. [2021-11-23 02:49:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 371 [2021-11-23 02:49:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:15,753 INFO L225 Difference]: With dead ends: 34138 [2021-11-23 02:49:15,753 INFO L226 Difference]: Without dead ends: 19898 [2021-11-23 02:49:15,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:15,843 INFO L933 BasicCegarLoop]: 5585 mSDtfsCounter, 2740 mSDsluCounter, 3792 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 8827 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:15,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2740 Valid, 8827 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1621 Invalid, 4 Unknown, 0 Unchecked, 18.7s Time] [2021-11-23 02:49:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19898 states. [2021-11-23 02:49:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19898 to 19887. [2021-11-23 02:49:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19887 states, 12180 states have (on average 1.2938423645320196) internal successors, (15759), 12470 states have internal predecessors, (15759), 6132 states have call successors, (6132), 1578 states have call predecessors, (6132), 1573 states have return successors, (6131), 6070 states have call predecessors, (6131), 6129 states have call successors, (6131) [2021-11-23 02:49:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19887 states to 19887 states and 28022 transitions. [2021-11-23 02:49:17,098 INFO L78 Accepts]: Start accepts. Automaton has 19887 states and 28022 transitions. Word has length 371 [2021-11-23 02:49:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:17,100 INFO L470 AbstractCegarLoop]: Abstraction has 19887 states and 28022 transitions. [2021-11-23 02:49:17,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 02:49:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19887 states and 28022 transitions. [2021-11-23 02:49:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-23 02:49:17,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:17,123 INFO L514 BasicCegarLoop]: trace histogram [35, 29, 29, 29, 29, 29, 29, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:17,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:49:17,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1054761777, now seen corresponding path program 1 times [2021-11-23 02:49:17,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369845297] [2021-11-23 02:49:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:17,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3770 trivial. 0 not checked. [2021-11-23 02:49:18,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369845297] [2021-11-23 02:49:18,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369845297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:18,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:49:18,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560967022] [2021-11-23 02:49:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:49:18,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:49:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:49:18,024 INFO L87 Difference]: Start difference. First operand 19887 states and 28022 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 02:49:20,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:31,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:33,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:40,780 INFO L93 Difference]: Finished difference Result 39770 states and 57871 transitions. [2021-11-23 02:49:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 434 [2021-11-23 02:49:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:41,017 INFO L225 Difference]: With dead ends: 39770 [2021-11-23 02:49:41,017 INFO L226 Difference]: Without dead ends: 39768 [2021-11-23 02:49:41,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:41,046 INFO L933 BasicCegarLoop]: 5142 mSDtfsCounter, 6031 mSDsluCounter, 10261 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 499 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6399 SdHoareTripleChecker+Valid, 14066 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:41,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6399 Valid, 14066 Invalid, 2910 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [499 Valid, 2408 Invalid, 3 Unknown, 0 Unchecked, 21.6s Time] [2021-11-23 02:49:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39768 states. [2021-11-23 02:49:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39768 to 29542. [2021-11-23 02:49:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29542 states, 18077 states have (on average 1.2941306632737732) internal successors, (23394), 18518 states have internal predecessors, (23394), 9125 states have call successors, (9125), 2347 states have call predecessors, (9125), 2338 states have return successors, (9125), 9022 states have call predecessors, (9125), 9122 states have call successors, (9125) [2021-11-23 02:49:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29542 states to 29542 states and 41644 transitions. [2021-11-23 02:49:43,254 INFO L78 Accepts]: Start accepts. Automaton has 29542 states and 41644 transitions. Word has length 434 [2021-11-23 02:49:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:43,255 INFO L470 AbstractCegarLoop]: Abstraction has 29542 states and 41644 transitions. [2021-11-23 02:49:43,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 02:49:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 29542 states and 41644 transitions. [2021-11-23 02:49:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-11-23 02:49:43,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:43,314 INFO L514 BasicCegarLoop]: trace histogram [43, 31, 31, 31, 31, 31, 31, 17, 17, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:43,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:49:43,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 937552484, now seen corresponding path program 1 times [2021-11-23 02:49:43,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:43,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403864308] [2021-11-23 02:49:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:43,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:43,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:49:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69336980] [2021-11-23 02:49:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:43,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:43,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:43,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:43,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:49:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:45,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 6828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:49:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5242 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 4821 trivial. 0 not checked. [2021-11-23 02:49:47,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:49:47,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403864308] [2021-11-23 02:49:47,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:49:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69336980] [2021-11-23 02:49:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69336980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:47,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:47,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:49:47,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555482676] [2021-11-23 02:49:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:47,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:47,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:47,947 INFO L87 Difference]: Start difference. First operand 29542 states and 41644 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-23 02:49:50,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:55,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:00,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:02,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:04,881 INFO L93 Difference]: Finished difference Result 68436 states and 96566 transitions. [2021-11-23 02:50:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:50:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) Word has length 772 [2021-11-23 02:50:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:05,269 INFO L225 Difference]: With dead ends: 68436 [2021-11-23 02:50:05,269 INFO L226 Difference]: Without dead ends: 39496 [2021-11-23 02:50:05,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:05,378 INFO L933 BasicCegarLoop]: 3913 mSDtfsCounter, 3650 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 30 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 6448 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:05,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3650 Valid, 6448 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1080 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 02:50:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39496 states. [2021-11-23 02:50:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39496 to 39473. [2021-11-23 02:50:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39473 states, 24344 states have (on average 1.3066053236937234) internal successors, (31808), 24921 states have internal predecessors, (31808), 11951 states have call successors, (11951), 3189 states have call predecessors, (11951), 3176 states have return successors, (11954), 11803 states have call predecessors, (11954), 11948 states have call successors, (11954) [2021-11-23 02:50:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39473 states to 39473 states and 55713 transitions. [2021-11-23 02:50:07,387 INFO L78 Accepts]: Start accepts. Automaton has 39473 states and 55713 transitions. Word has length 772 [2021-11-23 02:50:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:07,389 INFO L470 AbstractCegarLoop]: Abstraction has 39473 states and 55713 transitions. [2021-11-23 02:50:07,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-23 02:50:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 39473 states and 55713 transitions. [2021-11-23 02:50:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-11-23 02:50:07,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:07,438 INFO L514 BasicCegarLoop]: trace histogram [44, 31, 31, 31, 31, 31, 31, 17, 17, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:07,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:07,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:07,652 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1939263406, now seen corresponding path program 1 times [2021-11-23 02:50:07,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793577358] [2021-11-23 02:50:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:07,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:08,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:50:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800830987] [2021-11-23 02:50:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:08,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:08,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:08,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:08,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:50:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 6892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:50:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 5088 trivial. 0 not checked. [2021-11-23 02:50:11,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:11,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:11,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793577358] [2021-11-23 02:50:11,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:50:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800830987] [2021-11-23 02:50:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800830987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:11,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:11,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:50:11,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046255350] [2021-11-23 02:50:11,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:11,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:50:11,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:11,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:50:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:11,666 INFO L87 Difference]: Start difference. First operand 39473 states and 55713 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 02:50:13,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:24,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:26,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:29,186 INFO L93 Difference]: Finished difference Result 87960 states and 124118 transitions. [2021-11-23 02:50:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:50:29,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 789 [2021-11-23 02:50:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:29,534 INFO L225 Difference]: With dead ends: 87960 [2021-11-23 02:50:29,534 INFO L226 Difference]: Without dead ends: 49089 [2021-11-23 02:50:29,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:29,712 INFO L933 BasicCegarLoop]: 5643 mSDtfsCounter, 2803 mSDsluCounter, 3764 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 54 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2803 SdHoareTripleChecker+Valid, 8886 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:29,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2803 Valid, 8886 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1588 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 02:50:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49089 states. [2021-11-23 02:50:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49089 to 49074. [2021-11-23 02:50:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49074 states, 30313 states have (on average 1.3015867779500545) internal successors, (39455), 31025 states have internal predecessors, (39455), 14759 states have call successors, (14759), 4017 states have call predecessors, (14759), 4000 states have return successors, (14765), 14565 states have call predecessors, (14765), 14756 states have call successors, (14765) [2021-11-23 02:50:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49074 states to 49074 states and 68979 transitions. [2021-11-23 02:50:32,154 INFO L78 Accepts]: Start accepts. Automaton has 49074 states and 68979 transitions. Word has length 789 [2021-11-23 02:50:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:32,156 INFO L470 AbstractCegarLoop]: Abstraction has 49074 states and 68979 transitions. [2021-11-23 02:50:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 02:50:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49074 states and 68979 transitions. [2021-11-23 02:50:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2021-11-23 02:50:32,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:32,224 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:32,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:32,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:32,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1063106980, now seen corresponding path program 1 times [2021-11-23 02:50:32,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:32,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318279445] [2021-11-23 02:50:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:32,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:33,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:50:33,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32212873] [2021-11-23 02:50:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:33,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:33,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:33,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:50:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 6892 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:50:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5444 backedges. 826 proven. 0 refuted. 0 times theorem prover too weak. 4618 trivial. 0 not checked. [2021-11-23 02:50:37,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:37,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318279445] [2021-11-23 02:50:37,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:50:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32212873] [2021-11-23 02:50:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32212873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:37,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:37,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:50:37,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588322292] [2021-11-23 02:50:37,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:37,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:37,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:37,393 INFO L87 Difference]: Start difference. First operand 49074 states and 68979 transitions. Second operand has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:50:39,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:00,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:05,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:07,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:11,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:15,565 INFO L93 Difference]: Finished difference Result 112535 states and 160905 transitions. [2021-11-23 02:51:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:51:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 2 states have call successors, (104) Word has length 795 [2021-11-23 02:51:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:16,207 INFO L225 Difference]: With dead ends: 112535 [2021-11-23 02:51:16,208 INFO L226 Difference]: Without dead ends: 64063 [2021-11-23 02:51:16,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:51:16,351 INFO L933 BasicCegarLoop]: 4495 mSDtfsCounter, 761 mSDsluCounter, 25155 mSDsCounter, 0 mSdLazyCounter, 4409 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 26063 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4409 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:16,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 26063 Invalid, 4416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 4409 Invalid, 5 Unknown, 0 Unchecked, 35.6s Time] [2021-11-23 02:51:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2021-11-23 02:51:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 49158. [2021-11-23 02:51:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49158 states, 30385 states have (on average 1.3008721408589765) internal successors, (39527), 31097 states have internal predecessors, (39527), 14759 states have call successors, (14759), 4017 states have call predecessors, (14759), 4012 states have return successors, (14789), 14577 states have call predecessors, (14789), 14756 states have call successors, (14789) [2021-11-23 02:51:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49158 states to 49158 states and 69075 transitions. [2021-11-23 02:51:19,293 INFO L78 Accepts]: Start accepts. Automaton has 49158 states and 69075 transitions. Word has length 795 [2021-11-23 02:51:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:19,294 INFO L470 AbstractCegarLoop]: Abstraction has 49158 states and 69075 transitions. [2021-11-23 02:51:19,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:51:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 49158 states and 69075 transitions. [2021-11-23 02:51:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2021-11-23 02:51:19,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:19,341 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:19,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:19,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:51:19,568 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1608431120, now seen corresponding path program 1 times [2021-11-23 02:51:19,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500434792] [2021-11-23 02:51:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:19,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:19,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:19,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665731458] [2021-11-23 02:51:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:19,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:19,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:19,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:51:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 6920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:51:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5444 backedges. 826 proven. 0 refuted. 0 times theorem prover too weak. 4618 trivial. 0 not checked. [2021-11-23 02:51:24,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:24,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500434792] [2021-11-23 02:51:24,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665731458] [2021-11-23 02:51:24,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665731458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:24,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:24,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:24,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91556076] [2021-11-23 02:51:24,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:24,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:24,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:24,084 INFO L87 Difference]: Start difference. First operand 49158 states and 69075 transitions. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:51:26,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:39,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:41,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:43,100 INFO L93 Difference]: Finished difference Result 98230 states and 138187 transitions. [2021-11-23 02:51:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 800 [2021-11-23 02:51:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:43,557 INFO L225 Difference]: With dead ends: 98230 [2021-11-23 02:51:43,557 INFO L226 Difference]: Without dead ends: 49674 [2021-11-23 02:51:43,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:43,714 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 83 mSDsluCounter, 7720 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 9947 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:43,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 9947 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1704 Invalid, 3 Unknown, 0 Unchecked, 17.3s Time] [2021-11-23 02:51:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49674 states. [2021-11-23 02:51:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49674 to 49182. [2021-11-23 02:51:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49182 states, 30409 states have (on average 1.3006346805222138) internal successors, (39551), 31121 states have internal predecessors, (39551), 14759 states have call successors, (14759), 4017 states have call predecessors, (14759), 4012 states have return successors, (14789), 14577 states have call predecessors, (14789), 14756 states have call successors, (14789) [2021-11-23 02:51:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49182 states to 49182 states and 69099 transitions. [2021-11-23 02:51:46,062 INFO L78 Accepts]: Start accepts. Automaton has 49182 states and 69099 transitions. Word has length 800 [2021-11-23 02:51:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:46,063 INFO L470 AbstractCegarLoop]: Abstraction has 49182 states and 69099 transitions. [2021-11-23 02:51:46,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:51:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 49182 states and 69099 transitions. [2021-11-23 02:51:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-23 02:51:46,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:46,087 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:46,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:51:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:51:46,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2092206630, now seen corresponding path program 1 times [2021-11-23 02:51:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650434793] [2021-11-23 02:51:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:46,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:46,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946001267] [2021-11-23 02:51:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:46,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:46,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:46,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:51:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:48,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 6947 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:51:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5444 backedges. 826 proven. 0 refuted. 0 times theorem prover too weak. 4618 trivial. 0 not checked. [2021-11-23 02:51:50,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:50,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:50,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650434793] [2021-11-23 02:51:50,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:50,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946001267] [2021-11-23 02:51:50,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946001267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:50,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573460466] [2021-11-23 02:51:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:50,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:50,687 INFO L87 Difference]: Start difference. First operand 49182 states and 69099 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:51:52,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:06,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:08,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:09,647 INFO L93 Difference]: Finished difference Result 98302 states and 138271 transitions. [2021-11-23 02:52:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:52:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 801 [2021-11-23 02:52:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:10,019 INFO L225 Difference]: With dead ends: 98302 [2021-11-23 02:52:10,019 INFO L226 Difference]: Without dead ends: 49722 [2021-11-23 02:52:10,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 798 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:10,165 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 87 mSDsluCounter, 7723 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:10,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 9950 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1702 Invalid, 3 Unknown, 0 Unchecked, 17.2s Time] [2021-11-23 02:52:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-11-23 02:52:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 49206. [2021-11-23 02:52:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49206 states, 30433 states have (on average 1.300791903525778) internal successors, (39587), 31145 states have internal predecessors, (39587), 14759 states have call successors, (14759), 4017 states have call predecessors, (14759), 4012 states have return successors, (14789), 14577 states have call predecessors, (14789), 14756 states have call successors, (14789) [2021-11-23 02:52:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49206 states to 49206 states and 69135 transitions. [2021-11-23 02:52:12,374 INFO L78 Accepts]: Start accepts. Automaton has 49206 states and 69135 transitions. Word has length 801 [2021-11-23 02:52:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 49206 states and 69135 transitions. [2021-11-23 02:52:12,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-23 02:52:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49206 states and 69135 transitions. [2021-11-23 02:52:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2021-11-23 02:52:12,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:12,416 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:12,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:52:12,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 231466677, now seen corresponding path program 1 times [2021-11-23 02:52:12,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890161233] [2021-11-23 02:52:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:12,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:52:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892174998] [2021-11-23 02:52:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:12,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:12,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:12,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:52:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 6935 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:52:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5444 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 4858 trivial. 0 not checked. [2021-11-23 02:52:16,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:52:16,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890161233] [2021-11-23 02:52:16,793 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:52:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892174998] [2021-11-23 02:52:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892174998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:16,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:16,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:52:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142248318] [2021-11-23 02:52:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:16,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:52:16,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:52:16,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:52:16,797 INFO L87 Difference]: Start difference. First operand 49206 states and 69135 transitions. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 4 states have call predecessors, (105), 3 states have call successors, (105) [2021-11-23 02:52:18,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:41,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:43,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:47,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:53,535 INFO L93 Difference]: Finished difference Result 143620 states and 209980 transitions. [2021-11-23 02:52:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:52:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 4 states have call predecessors, (105), 3 states have call successors, (105) Word has length 804 [2021-11-23 02:52:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:53,993 INFO L225 Difference]: With dead ends: 143620 [2021-11-23 02:52:53,993 INFO L226 Difference]: Without dead ends: 95016 [2021-11-23 02:52:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:52:54,292 INFO L933 BasicCegarLoop]: 5076 mSDtfsCounter, 2789 mSDsluCounter, 21701 mSDsCounter, 0 mSdLazyCounter, 3664 mSolverCounterSat, 654 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 23903 SdHoareTripleChecker+Invalid, 4322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 3664 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3468 Valid, 23903 Invalid, 4322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [654 Valid, 3664 Invalid, 4 Unknown, 0 Unchecked, 32.8s Time] [2021-11-23 02:52:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95016 states. [2021-11-23 02:52:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95016 to 49341. [2021-11-23 02:52:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49341 states, 30508 states have (on average 1.3004457847122066) internal successors, (39674), 31232 states have internal predecessors, (39674), 14807 states have call successors, (14807), 4017 states have call predecessors, (14807), 4024 states have return successors, (14873), 14628 states have call predecessors, (14873), 14804 states have call successors, (14873) [2021-11-23 02:52:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49341 states to 49341 states and 69354 transitions. [2021-11-23 02:52:57,503 INFO L78 Accepts]: Start accepts. Automaton has 49341 states and 69354 transitions. Word has length 804 [2021-11-23 02:52:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:57,504 INFO L470 AbstractCegarLoop]: Abstraction has 49341 states and 69354 transitions. [2021-11-23 02:52:57,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 4 states have call predecessors, (105), 3 states have call successors, (105) [2021-11-23 02:52:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 49341 states and 69354 transitions. [2021-11-23 02:52:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2021-11-23 02:52:57,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:57,541 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:57,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:57,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:57,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash -927004367, now seen corresponding path program 1 times [2021-11-23 02:52:57,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942251826] [2021-11-23 02:52:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:57,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:58,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:52:58,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293373763] [2021-11-23 02:52:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:58,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:58,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:58,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:53:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 7166 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:53:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5522 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 4922 trivial. 0 not checked. [2021-11-23 02:53:02,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:53:02,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942251826] [2021-11-23 02:53:02,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:53:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293373763] [2021-11-23 02:53:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293373763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:02,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:02,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:53:02,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811021200] [2021-11-23 02:53:02,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:02,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:53:02,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:53:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:53:02,484 INFO L87 Difference]: Start difference. First operand 49341 states and 69354 transitions. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 6 states have internal predecessors, (254), 3 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 4 states have call predecessors, (109), 3 states have call successors, (109) [2021-11-23 02:53:04,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:25,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:27,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:32,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:34,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:41,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:48,242 INFO L93 Difference]: Finished difference Result 129093 states and 186992 transitions. [2021-11-23 02:53:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:53:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 6 states have internal predecessors, (254), 3 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 4 states have call predecessors, (109), 3 states have call successors, (109) Word has length 847 [2021-11-23 02:53:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:48,708 INFO L225 Difference]: With dead ends: 129093 [2021-11-23 02:53:48,708 INFO L226 Difference]: Without dead ends: 80354 [2021-11-23 02:53:48,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:53:48,844 INFO L933 BasicCegarLoop]: 4960 mSDtfsCounter, 2337 mSDsluCounter, 26771 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 650 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 28081 SdHoareTripleChecker+Invalid, 5161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:48,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 28081 Invalid, 5161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [650 Valid, 4505 Invalid, 6 Unknown, 0 Unchecked, 41.8s Time] [2021-11-23 02:53:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80354 states. [2021-11-23 02:53:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80354 to 49353. [2021-11-23 02:53:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49353 states, 30520 states have (on average 1.3003276539973787) internal successors, (39686), 31232 states have internal predecessors, (39686), 14807 states have call successors, (14807), 4017 states have call predecessors, (14807), 4024 states have return successors, (14873), 14628 states have call predecessors, (14873), 14804 states have call successors, (14873) [2021-11-23 02:53:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49353 states to 49353 states and 69366 transitions. [2021-11-23 02:53:53,090 INFO L78 Accepts]: Start accepts. Automaton has 49353 states and 69366 transitions. Word has length 847 [2021-11-23 02:53:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 49353 states and 69366 transitions. [2021-11-23 02:53:53,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 6 states have internal predecessors, (254), 3 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 4 states have call predecessors, (109), 3 states have call successors, (109) [2021-11-23 02:53:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 49353 states and 69366 transitions. [2021-11-23 02:53:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-11-23 02:53:53,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:53,139 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:53,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:53:53,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:53,356 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -531420109, now seen corresponding path program 1 times [2021-11-23 02:53:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:53,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462285256] [2021-11-23 02:53:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:53,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:53,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:53:53,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588749554] [2021-11-23 02:53:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:53,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:53,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:53,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:53:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 6968 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:53:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 4826 trivial. 0 not checked. [2021-11-23 02:53:57,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:53:57,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:57,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462285256] [2021-11-23 02:53:57,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:53:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588749554] [2021-11-23 02:53:57,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588749554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:57,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:57,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:53:57,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686899791] [2021-11-23 02:53:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:57,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:53:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:53:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:57,751 INFO L87 Difference]: Start difference. First operand 49353 states and 69366 transitions. Second operand has 8 states, 8 states have (on average 31.5) internal successors, (252), 7 states have internal predecessors, (252), 4 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (107), 5 states have call predecessors, (107), 4 states have call successors, (107) [2021-11-23 02:53:59,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:28,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:36,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:38,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:40,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:42,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:50,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:55,958 INFO L93 Difference]: Finished difference Result 146971 states and 215251 transitions. [2021-11-23 02:54:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:54:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 7 states have internal predecessors, (252), 4 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (107), 5 states have call predecessors, (107), 4 states have call successors, (107) Word has length 819 [2021-11-23 02:54:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:56,338 INFO L225 Difference]: With dead ends: 146971 [2021-11-23 02:54:56,338 INFO L226 Difference]: Without dead ends: 98220 [2021-11-23 02:54:56,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 815 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:54:56,475 INFO L933 BasicCegarLoop]: 5310 mSDtfsCounter, 5349 mSDsluCounter, 32809 mSDsCounter, 0 mSdLazyCounter, 5188 mSolverCounterSat, 2340 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5758 SdHoareTripleChecker+Valid, 33829 SdHoareTripleChecker+Invalid, 7535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2340 IncrementalHoareTripleChecker+Valid, 5188 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:56,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5758 Valid, 33829 Invalid, 7535 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2340 Valid, 5188 Invalid, 7 Unknown, 0 Unchecked, 51.9s Time] [2021-11-23 02:54:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98220 states. [2021-11-23 02:54:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98220 to 49656. [2021-11-23 02:54:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49656 states, 30679 states have (on average 1.2991622934254703) internal successors, (39857), 31403 states have internal predecessors, (39857), 14939 states have call successors, (14939), 4017 states have call predecessors, (14939), 4036 states have return successors, (15041), 14763 states have call predecessors, (15041), 14936 states have call successors, (15041) [2021-11-23 02:55:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49656 states to 49656 states and 69837 transitions. [2021-11-23 02:55:00,114 INFO L78 Accepts]: Start accepts. Automaton has 49656 states and 69837 transitions. Word has length 819 [2021-11-23 02:55:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 49656 states and 69837 transitions. [2021-11-23 02:55:00,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 7 states have internal predecessors, (252), 4 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (107), 5 states have call predecessors, (107), 4 states have call successors, (107) [2021-11-23 02:55:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 49656 states and 69837 transitions. [2021-11-23 02:55:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2021-11-23 02:55:00,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:00,149 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:00,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:00,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:55:00,364 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash -781396293, now seen corresponding path program 1 times [2021-11-23 02:55:00,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:00,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880007260] [2021-11-23 02:55:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:00,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:00,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:55:00,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297172158] [2021-11-23 02:55:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:00,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:00,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:00,926 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:55:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 7204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:55:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5522 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 5250 trivial. 0 not checked. [2021-11-23 02:55:04,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:55:04,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880007260] [2021-11-23 02:55:04,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:55:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297172158] [2021-11-23 02:55:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297172158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:04,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:04,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:04,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072088573] [2021-11-23 02:55:04,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:04,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:04,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:04,226 INFO L87 Difference]: Start difference. First operand 49656 states and 69837 transitions. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (111), 3 states have call predecessors, (111), 4 states have return successors, (110), 4 states have call predecessors, (110), 3 states have call successors, (110) [2021-11-23 02:55:06,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:29,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:31,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:37,766 INFO L93 Difference]: Finished difference Result 118266 states and 166109 transitions. [2021-11-23 02:55:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:55:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (111), 3 states have call predecessors, (111), 4 states have return successors, (110), 4 states have call predecessors, (110), 3 states have call successors, (110) Word has length 855 [2021-11-23 02:55:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:38,246 INFO L225 Difference]: With dead ends: 118266 [2021-11-23 02:55:38,246 INFO L226 Difference]: Without dead ends: 69212 [2021-11-23 02:55:38,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:38,376 INFO L933 BasicCegarLoop]: 5630 mSDtfsCounter, 2741 mSDsluCounter, 16891 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 20135 SdHoareTripleChecker+Invalid, 3579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:38,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 20135 Invalid, 3579 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 3547 Invalid, 3 Unknown, 0 Unchecked, 30.1s Time] [2021-11-23 02:55:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69212 states. [2021-11-23 02:55:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69212 to 59428. [2021-11-23 02:55:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59428 states, 36756 states have (on average 1.2953531396234628) internal successors, (47612), 37618 states have internal predecessors, (47612), 17792 states have call successors, (17792), 4845 states have call predecessors, (17792), 4878 states have return successors, (17930), 17582 states have call predecessors, (17930), 17789 states have call successors, (17930) [2021-11-23 02:55:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59428 states to 59428 states and 83334 transitions. [2021-11-23 02:55:41,782 INFO L78 Accepts]: Start accepts. Automaton has 59428 states and 83334 transitions. Word has length 855 [2021-11-23 02:55:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:41,783 INFO L470 AbstractCegarLoop]: Abstraction has 59428 states and 83334 transitions. [2021-11-23 02:55:41,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (111), 3 states have call predecessors, (111), 4 states have return successors, (110), 4 states have call predecessors, (110), 3 states have call successors, (110) [2021-11-23 02:55:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 59428 states and 83334 transitions. [2021-11-23 02:55:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2021-11-23 02:55:41,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:41,808 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:41,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:42,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:55:42,010 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:42,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1271932721, now seen corresponding path program 1 times [2021-11-23 02:55:42,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766179160] [2021-11-23 02:55:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:42,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:42,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:55:42,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176638221] [2021-11-23 02:55:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:42,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:42,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:42,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:55:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 7205 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:55:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5522 backedges. 890 proven. 0 refuted. 0 times theorem prover too weak. 4632 trivial. 0 not checked. [2021-11-23 02:55:46,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:55:46,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766179160] [2021-11-23 02:55:46,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:55:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176638221] [2021-11-23 02:55:46,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176638221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:46,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:46,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:55:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927560838] [2021-11-23 02:55:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:46,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:46,703 INFO L87 Difference]: Start difference. First operand 59428 states and 83334 transitions. Second operand has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 5 states have internal predecessors, (274), 2 states have call successors, (115), 2 states have call predecessors, (115), 3 states have return successors, (114), 3 states have call predecessors, (114), 2 states have call successors, (114) [2021-11-23 02:55:48,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:10,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:12,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:17,021 INFO L93 Difference]: Finished difference Result 135721 states and 193375 transitions. [2021-11-23 02:56:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 5 states have internal predecessors, (274), 2 states have call successors, (115), 2 states have call predecessors, (115), 3 states have return successors, (114), 3 states have call predecessors, (114), 2 states have call successors, (114) Word has length 856 [2021-11-23 02:56:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:17,321 INFO L225 Difference]: With dead ends: 135721 [2021-11-23 02:56:17,321 INFO L226 Difference]: Without dead ends: 76895 [2021-11-23 02:56:17,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:56:17,481 INFO L933 BasicCegarLoop]: 3938 mSDtfsCounter, 757 mSDsluCounter, 17642 mSDsCounter, 0 mSdLazyCounter, 3135 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 19118 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3135 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:17,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 19118 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3135 Invalid, 3 Unknown, 0 Unchecked, 25.8s Time] [2021-11-23 02:56:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76895 states. [2021-11-23 02:56:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76895 to 59413. [2021-11-23 02:56:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59413 states, 36741 states have (on average 1.2954737214555945) internal successors, (47597), 37603 states have internal predecessors, (47597), 17792 states have call successors, (17792), 4845 states have call predecessors, (17792), 4878 states have return successors, (17930), 17582 states have call predecessors, (17930), 17789 states have call successors, (17930) [2021-11-23 02:56:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59413 states to 59413 states and 83319 transitions. [2021-11-23 02:56:21,314 INFO L78 Accepts]: Start accepts. Automaton has 59413 states and 83319 transitions. Word has length 856 [2021-11-23 02:56:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:21,315 INFO L470 AbstractCegarLoop]: Abstraction has 59413 states and 83319 transitions. [2021-11-23 02:56:21,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 5 states have internal predecessors, (274), 2 states have call successors, (115), 2 states have call predecessors, (115), 3 states have return successors, (114), 3 states have call predecessors, (114), 2 states have call successors, (114) [2021-11-23 02:56:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59413 states and 83319 transitions. [2021-11-23 02:56:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2021-11-23 02:56:21,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:21,341 INFO L514 BasicCegarLoop]: trace histogram [45, 31, 31, 31, 31, 31, 31, 17, 17, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:21,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 02:56:21,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:56:21,568 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1808389473, now seen corresponding path program 1 times [2021-11-23 02:56:21,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622435408] [2021-11-23 02:56:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:21,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:21,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:56:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032866028] [2021-11-23 02:56:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:21,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:21,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:21,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7c56abf-6341-46ba-a6f2-e63a66085f07/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:56:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:23,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 7268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:56:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5522 backedges. 784 proven. 0 refuted. 0 times theorem prover too weak. 4738 trivial. 0 not checked. [2021-11-23 02:56:25,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:56:25,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:25,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622435408] [2021-11-23 02:56:25,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:56:25,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032866028] [2021-11-23 02:56:25,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032866028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:25,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:25,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:56:25,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53895576] [2021-11-23 02:56:25,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:25,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:25,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:56:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:25,802 INFO L87 Difference]: Start difference. First operand 59413 states and 83319 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2021-11-23 02:56:27,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:39,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []