./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS --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 484c71f67ef44adda28419ba4f7367133d47a44b7b25589681c020e12726250b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:10:26,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:10:26,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:10:26,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:10:26,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:10:26,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:10:26,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:10:26,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:10:26,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:10:26,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:10:26,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:10:26,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:10:26,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:10:26,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:10:26,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:10:26,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:10:26,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:10:26,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:10:26,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:10:26,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:10:26,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:10:26,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:10:26,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:10:26,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:10:26,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:10:26,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:10:26,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:10:26,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:10:26,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:10:26,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:10:26,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:10:26,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:10:26,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:10:26,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:10:26,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:10:26,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:10:26,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:10:26,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:10:26,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:10:26,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:10:26,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:10:26,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:10:26,660 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:10:26,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:10:26,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:10:26,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:10:26,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:10:26,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:10:26,662 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:10:26,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:10:26,662 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:10:26,662 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:10:26,663 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:10:26,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:10:26,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:10:26,663 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:10:26,663 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:10:26,664 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:10:26,664 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:10:26,664 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:10:26,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:10:26,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:10:26,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:10:26,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:10:26,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:10:26,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:10:26,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:10:26,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:10:26,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:10:26,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:10:26,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:10:26,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:26,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:10:26,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:10:26,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:10:26,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:10:26,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:10:26,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:10:26,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:10:26,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:10:26,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484c71f67ef44adda28419ba4f7367133d47a44b7b25589681c020e12726250b [2022-11-19 08:10:26,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:10:26,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:10:26,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:10:26,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:10:26,986 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:10:26,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2022-11-19 08:10:27,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/data/9f63f9723/be6993af981447b0889fb3c9eb999b67/FLAG625eddb2d [2022-11-19 08:10:28,175 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:10:28,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2022-11-19 08:10:28,252 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/data/9f63f9723/be6993af981447b0889fb3c9eb999b67/FLAG625eddb2d [2022-11-19 08:10:28,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/data/9f63f9723/be6993af981447b0889fb3c9eb999b67 [2022-11-19 08:10:28,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:10:28,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:10:28,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:28,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:10:28,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:10:28,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:28" (1/1) ... [2022-11-19 08:10:28,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c11cda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:28, skipping insertion in model container [2022-11-19 08:10:28,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:28" (1/1) ... [2022-11-19 08:10:28,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:10:28,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:10:32,729 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486836,486849] [2022-11-19 08:10:32,735 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486983,486996] [2022-11-19 08:10:32,736 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487122,487135] [2022-11-19 08:10:32,736 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487280,487293] [2022-11-19 08:10:32,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:32,850 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:10:33,409 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486836,486849] [2022-11-19 08:10:33,410 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486983,486996] [2022-11-19 08:10:33,410 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487122,487135] [2022-11-19 08:10:33,411 WARN L234 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_033ea647-3079-482e-a422-9026f88fddd1/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487280,487293] [2022-11-19 08:10:33,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:33,708 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:10:33,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33 WrapperNode [2022-11-19 08:10:33,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:33,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:33,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:10:33,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:10:33,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:33,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,239 INFO L138 Inliner]: procedures = 480, calls = 6076, calls flagged for inlining = 277, calls inlined = 258, statements flattened = 12239 [2022-11-19 08:10:34,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:34,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:10:34,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:10:34,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:10:34,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:10:34,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:10:34,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:10:34,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:10:34,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (1/1) ... [2022-11-19 08:10:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:34,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:34,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:10:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033ea647-3079-482e-a422-9026f88fddd1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:10:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-19 08:10:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-19 08:10:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:10:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:10:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 08:10:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 08:10:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_vfta [2022-11-19 08:10:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_vfta [2022-11-19 08:10:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:10:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:10:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_standby_eeprom [2022-11-19 08:10:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_standby_eeprom [2022-11-19 08:10:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-11-19 08:10:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-11-19 08:10:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 08:10:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 08:10:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-19 08:10:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-19 08:10:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 08:10:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 08:10:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_alloc_rx_buffers [2022-11-19 08:10:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_alloc_rx_buffers [2022-11-19 08:10:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure mac_addr_valid [2022-11-19 08:10:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure mac_addr_valid [2022-11-19 08:10:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_vlan_rx_add_vid [2022-11-19 08:10:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_vlan_rx_add_vid [2022-11-19 08:10:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_tx_resources [2022-11-19 08:10:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_tx_resources [2022-11-19 08:10:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-19 08:10:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-19 08:10:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_multi [2022-11-19 08:10:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_multi [2022-11-19 08:10:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_rar_set [2022-11-19 08:10:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_rar_set [2022-11-19 08:10:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-19 08:10:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-19 08:10:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 08:10:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-19 08:10:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-19 08:10:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-19 08:10:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-19 08:10:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-19 08:10:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_io_resume [2022-11-19 08:10:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_io_resume [2022-11-19 08:10:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 08:10:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 08:10:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 08:10:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 08:10:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:10:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-19 08:10:34,965 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-19 08:10:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_eeprom_checksum [2022-11-19 08:10:34,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_eeprom_checksum [2022-11-19 08:10:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 08:10:34,965 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 08:10:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_netpoll [2022-11-19 08:10:34,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_netpoll [2022-11-19 08:10:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:10:34,966 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:10:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:10:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_raise_clock [2022-11-19 08:10:34,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_raise_clock [2022-11-19 08:10:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_eeprom [2022-11-19 08:10:34,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_eeprom [2022-11-19 08:10:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 08:10:34,967 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 08:10:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_identify_xpak_vendor [2022-11-19 08:10:34,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_identify_xpak_vendor [2022-11-19 08:10:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:10:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-19 08:10:34,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-19 08:10:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_mac_reset [2022-11-19 08:10:34,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_mac_reset [2022-11-19 08:10:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_eeprom [2022-11-19 08:10:34,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_eeprom [2022-11-19 08:10:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:10:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_rx_resources [2022-11-19 08:10:34,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_rx_resources [2022-11-19 08:10:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 08:10:34,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 08:10:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure vzalloc [2022-11-19 08:10:34,969 INFO L138 BoogieDeclarations]: Found implementation of procedure vzalloc [2022-11-19 08:10:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:10:34,969 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:10:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-19 08:10:34,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-19 08:10:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2022-11-19 08:10:34,970 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2022-11-19 08:10:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-19 08:10:34,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-19 08:10:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-19 08:10:34,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-19 08:10:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_regs_len [2022-11-19 08:10:34,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_regs_len [2022-11-19 08:10:34,971 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-11-19 08:10:34,971 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-11-19 08:10:34,971 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 08:10:34,971 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 08:10:34,971 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_phy_reg [2022-11-19 08:10:34,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_phy_reg [2022-11-19 08:10:34,972 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_for_link [2022-11-19 08:10:34,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_for_link [2022-11-19 08:10:34,972 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_option [2022-11-19 08:10:34,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_option [2022-11-19 08:10:34,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:10:34,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-19 08:10:34,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-19 08:10:34,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-19 08:10:34,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-19 08:10:34,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-19 08:10:34,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-19 08:10:34,973 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2022-11-19 08:10:34,974 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2022-11-19 08:10:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:10:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-19 08:10:34,974 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-19 08:10:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 08:10:34,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 08:10:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 08:10:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 08:10:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:10:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:10:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:10:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_lower_clock [2022-11-19 08:10:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_lower_clock [2022-11-19 08:10:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_reset [2022-11-19 08:10:34,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_reset [2022-11-19 08:10:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:10:34,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:10:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_remove [2022-11-19 08:10:34,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_remove [2022-11-19 08:10:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 08:10:34,977 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 08:10:34,977 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_len [2022-11-19 08:10:34,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_len [2022-11-19 08:10:34,977 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_up [2022-11-19 08:10:34,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_up [2022-11-19 08:10:34,977 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_irq_enable [2022-11-19 08:10:34,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_irq_enable [2022-11-19 08:10:34,978 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2022-11-19 08:10:34,978 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2022-11-19 08:10:34,978 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 08:10:34,978 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 08:10:34,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-19 08:10:34,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-19 08:10:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_tx_resources [2022-11-19 08:10:34,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_tx_resources [2022-11-19 08:10:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_maybe_stop_tx [2022-11-19 08:10:34,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_maybe_stop_tx [2022-11-19 08:10:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_intr [2022-11-19 08:10:34,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_intr [2022-11-19 08:10:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-19 08:10:34,980 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-19 08:10:34,980 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 08:10:34,980 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 08:10:34,980 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_open [2022-11-19 08:10:34,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_open [2022-11-19 08:10:34,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:10:34,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:10:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2022-11-19 08:10:34,981 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2022-11-19 08:10:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-19 08:10:34,981 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-19 08:10:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:10:34,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:10:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:10:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:10:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-19 08:10:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-19 08:10:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-19 08:10:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-19 08:10:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2022-11-19 08:10:34,983 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2022-11-19 08:10:34,983 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_update_stats [2022-11-19 08:10:34,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_update_stats [2022-11-19 08:10:34,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-19 08:10:34,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-19 08:10:34,983 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_and_get_eeprom_data [2022-11-19 08:10:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_and_get_eeprom_data [2022-11-19 08:10:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2022-11-19 08:10:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2022-11-19 08:10:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:10:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:10:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 08:10:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 08:10:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2022-11-19 08:10:34,985 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2022-11-19 08:10:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_close [2022-11-19 08:10:34,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_close [2022-11-19 08:10:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2022-11-19 08:10:34,985 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2022-11-19 08:10:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2022-11-19 08:10:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2022-11-19 08:10:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 08:10:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 08:10:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-19 08:10:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-19 08:10:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:10:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2022-11-19 08:10:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2022-11-19 08:10:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-19 08:10:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-19 08:10:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:10:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2022-11-19 08:10:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2022-11-19 08:10:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:10:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-19 08:10:34,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-19 08:10:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-19 08:10:34,988 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-19 08:10:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:10:34,988 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:10:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-19 08:10:34,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-19 08:10:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_link_reset [2022-11-19 08:10:34,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_link_reset [2022-11-19 08:10:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_speed_duplex [2022-11-19 08:10:34,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_speed_duplex [2022-11-19 08:10:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-19 08:10:34,990 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-19 08:10:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 08:10:34,990 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 08:10:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 08:10:34,990 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 08:10:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2022-11-19 08:10:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2022-11-19 08:10:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 08:10:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 08:10:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_unmap_and_free_tx_resource [2022-11-19 08:10:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_unmap_and_free_tx_resource [2022-11-19 08:10:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2022-11-19 08:10:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2022-11-19 08:10:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:10:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:10:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:10:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_eeprom [2022-11-19 08:10:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_eeprom [2022-11-19 08:10:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:10:34,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:10:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_phy_reg [2022-11-19 08:10:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_phy_reg [2022-11-19 08:10:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 08:10:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 08:10:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_ee_mac_addr [2022-11-19 08:10:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_ee_mac_addr [2022-11-19 08:10:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-19 08:10:35,000 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-19 08:10:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure dma_set_mask_and_coherent [2022-11-19 08:10:35,000 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_set_mask_and_coherent [2022-11-19 08:10:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_tx_ring [2022-11-19 08:10:35,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_tx_ring [2022-11-19 08:10:35,006 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2022-11-19 08:10:35,007 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2022-11-19 08:10:35,007 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2022-11-19 08:10:35,007 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2022-11-19 08:10:35,007 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_rx_ring [2022-11-19 08:10:35,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_rx_ring [2022-11-19 08:10:35,007 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_shift_out_bits [2022-11-19 08:10:35,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_shift_out_bits [2022-11-19 08:10:35,008 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_down [2022-11-19 08:10:35,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_down [2022-11-19 08:10:35,008 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_tx_timeout [2022-11-19 08:10:35,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_tx_timeout [2022-11-19 08:10:35,008 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_rx_resources [2022-11-19 08:10:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_rx_resources [2022-11-19 08:10:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-19 08:10:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-19 08:10:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-19 08:10:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-19 08:10:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-19 08:10:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-19 08:10:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2022-11-19 08:10:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2022-11-19 08:10:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2022-11-19 08:10:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2022-11-19 08:10:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-19 08:10:35,011 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-19 08:10:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:10:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-19 08:10:35,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-19 08:10:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-11-19 08:10:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_data [2022-11-19 08:10:35,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_data [2022-11-19 08:10:36,363 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:10:36,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:10:36,799 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:11:05,966 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-19 08:11:06,355 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:11:10,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:11:10,024 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:11:10,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:11:10 BoogieIcfgContainer [2022-11-19 08:11:10,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:11:10,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:11:10,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:11:10,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:11:10,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:10:28" (1/3) ... [2022-11-19 08:11:10,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b66ff19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:11:10, skipping insertion in model container [2022-11-19 08:11:10,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:33" (2/3) ... [2022-11-19 08:11:10,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b66ff19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:11:10, skipping insertion in model container [2022-11-19 08:11:10,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:11:10" (3/3) ... [2022-11-19 08:11:10,043 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2022-11-19 08:11:10,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:11:10,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:11:10,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:11:10,216 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@61093358, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:11:10,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:11:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 2521 states, 1466 states have (on average 1.2462482946793998) internal successors, (1827), 1501 states have internal predecessors, (1827), 921 states have call successors, (921), 133 states have call predecessors, (921), 132 states have return successors, (916), 906 states have call predecessors, (916), 916 states have call successors, (916) [2022-11-19 08:11:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 08:11:10,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:10,265 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:10,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1304764733, now seen corresponding path program 1 times [2022-11-19 08:11:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:10,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414638236] [2022-11-19 08:11:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-11-19 08:11:11,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414638236] [2022-11-19 08:11:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414638236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:11,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:11,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939845463] [2022-11-19 08:11:11,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:11,979 INFO L87 Difference]: Start difference. First operand has 2521 states, 1466 states have (on average 1.2462482946793998) internal successors, (1827), 1501 states have internal predecessors, (1827), 921 states have call successors, (921), 133 states have call predecessors, (921), 132 states have return successors, (916), 906 states have call predecessors, (916), 916 states have call successors, (916) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 08:11:14,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:18,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:25,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:25,757 INFO L93 Difference]: Finished difference Result 7424 states and 10891 transitions. [2022-11-19 08:11:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:25,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 176 [2022-11-19 08:11:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:25,814 INFO L225 Difference]: With dead ends: 7424 [2022-11-19 08:11:25,814 INFO L226 Difference]: Without dead ends: 4918 [2022-11-19 08:11:25,839 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:11:25,843 INFO L413 NwaCegarLoop]: 4233 mSDtfsCounter, 3527 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 7367 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:25,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 7367 Invalid, 1002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 997 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2022-11-19 08:11:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2022-11-19 08:11:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4914. [2022-11-19 08:11:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 2862 states have (on average 1.2403913347309574) internal successors, (3550), 2929 states have internal predecessors, (3550), 1788 states have call successors, (1788), 263 states have call predecessors, (1788), 262 states have return successors, (1786), 1764 states have call predecessors, (1786), 1786 states have call successors, (1786) [2022-11-19 08:11:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 7124 transitions. [2022-11-19 08:11:26,414 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 7124 transitions. Word has length 176 [2022-11-19 08:11:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:26,419 INFO L495 AbstractCegarLoop]: Abstraction has 4914 states and 7124 transitions. [2022-11-19 08:11:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 08:11:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 7124 transitions. [2022-11-19 08:11:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-19 08:11:26,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:26,439 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:26,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:11:26,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1996040871, now seen corresponding path program 1 times [2022-11-19 08:11:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:26,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336887961] [2022-11-19 08:11:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-11-19 08:11:27,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:27,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336887961] [2022-11-19 08:11:27,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336887961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:27,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:27,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736870555] [2022-11-19 08:11:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:27,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:27,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:27,603 INFO L87 Difference]: Start difference. First operand 4914 states and 7124 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 08:11:30,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:35,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:41,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:42,138 INFO L93 Difference]: Finished difference Result 11332 states and 16434 transitions. [2022-11-19 08:11:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 197 [2022-11-19 08:11:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:42,189 INFO L225 Difference]: With dead ends: 11332 [2022-11-19 08:11:42,190 INFO L226 Difference]: Without dead ends: 6451 [2022-11-19 08:11:42,221 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:11:42,222 INFO L413 NwaCegarLoop]: 3998 mSDtfsCounter, 2846 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2846 SdHoareTripleChecker+Valid, 7097 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:42,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2846 Valid, 7097 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1058 Invalid, 2 Unknown, 0 Unchecked, 14.1s Time] [2022-11-19 08:11:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2022-11-19 08:11:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 6442. [2022-11-19 08:11:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 3742 states have (on average 1.2279529663281668) internal successors, (4595), 3820 states have internal predecessors, (4595), 2363 states have call successors, (2363), 336 states have call predecessors, (2363), 335 states have return successors, (2361), 2334 states have call predecessors, (2361), 2361 states have call successors, (2361) [2022-11-19 08:11:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 9319 transitions. [2022-11-19 08:11:42,925 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 9319 transitions. Word has length 197 [2022-11-19 08:11:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 6442 states and 9319 transitions. [2022-11-19 08:11:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 08:11:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 9319 transitions. [2022-11-19 08:11:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-19 08:11:42,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:42,934 INFO L195 NwaCegarLoop]: trace histogram [20, 16, 16, 16, 16, 16, 16, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:11:42,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash -525371106, now seen corresponding path program 1 times [2022-11-19 08:11:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163351630] [2022-11-19 08:11:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-11-19 08:11:44,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:44,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163351630] [2022-11-19 08:11:44,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163351630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:44,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:44,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:11:44,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426231383] [2022-11-19 08:11:44,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:11:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:11:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:11:44,305 INFO L87 Difference]: Start difference. First operand 6442 states and 9319 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 08:11:47,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:54,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:05,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:07,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:09,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:10,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:12,540 INFO L93 Difference]: Finished difference Result 10876 states and 15727 transitions. [2022-11-19 08:12:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 214 [2022-11-19 08:12:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:12,624 INFO L225 Difference]: With dead ends: 10876 [2022-11-19 08:12:12,625 INFO L226 Difference]: Without dead ends: 10859 [2022-11-19 08:12:12,635 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:12:12,636 INFO L413 NwaCegarLoop]: 4896 mSDtfsCounter, 3528 mSDsluCounter, 7986 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 12882 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:12,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 12882 Invalid, 1790 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 1788 Invalid, 2 Unknown, 0 Unchecked, 27.8s Time] [2022-11-19 08:12:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-11-19 08:12:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10855. [2022-11-19 08:12:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10855 states, 6310 states have (on average 1.2291600633914421) internal successors, (7756), 6441 states have internal predecessors, (7756), 3971 states have call successors, (3971), 573 states have call predecessors, (3971), 572 states have return successors, (3969), 3922 states have call predecessors, (3969), 3969 states have call successors, (3969) [2022-11-19 08:12:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10855 states to 10855 states and 15696 transitions. [2022-11-19 08:12:13,673 INFO L78 Accepts]: Start accepts. Automaton has 10855 states and 15696 transitions. Word has length 214 [2022-11-19 08:12:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:13,675 INFO L495 AbstractCegarLoop]: Abstraction has 10855 states and 15696 transitions. [2022-11-19 08:12:13,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 08:12:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10855 states and 15696 transitions. [2022-11-19 08:12:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-19 08:12:13,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:13,686 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 16, 16, 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] [2022-11-19 08:12:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:12:13,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash -188780231, now seen corresponding path program 1 times [2022-11-19 08:12:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:13,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386965601] [2022-11-19 08:12:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-11-19 08:12:14,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:14,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386965601] [2022-11-19 08:12:14,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386965601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:14,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:14,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718387594] [2022-11-19 08:12:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:14,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:14,321 INFO L87 Difference]: Start difference. First operand 10855 states and 15696 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 08:12:20,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:24,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:30,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:30,900 INFO L93 Difference]: Finished difference Result 24157 states and 34702 transitions. [2022-11-19 08:12:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 229 [2022-11-19 08:12:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:30,993 INFO L225 Difference]: With dead ends: 24157 [2022-11-19 08:12:30,994 INFO L226 Difference]: Without dead ends: 13335 [2022-11-19 08:12:31,048 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:12:31,049 INFO L413 NwaCegarLoop]: 3739 mSDtfsCounter, 2327 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 6805 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:31,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 6805 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1041 Invalid, 3 Unknown, 0 Unchecked, 16.0s Time] [2022-11-19 08:12:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2022-11-19 08:12:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13320. [2022-11-19 08:12:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13320 states, 7744 states have (on average 1.2209452479338843) internal successors, (9455), 7922 states have internal predecessors, (9455), 4777 states have call successors, (4777), 800 states have call predecessors, (4777), 797 states have return successors, (4785), 4704 states have call predecessors, (4785), 4775 states have call successors, (4785) [2022-11-19 08:12:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13320 states to 13320 states and 19017 transitions. [2022-11-19 08:12:32,148 INFO L78 Accepts]: Start accepts. Automaton has 13320 states and 19017 transitions. Word has length 229 [2022-11-19 08:12:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:32,149 INFO L495 AbstractCegarLoop]: Abstraction has 13320 states and 19017 transitions. [2022-11-19 08:12:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 08:12:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 13320 states and 19017 transitions. [2022-11-19 08:12:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-19 08:12:32,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:32,157 INFO L195 NwaCegarLoop]: trace histogram [20, 16, 16, 16, 16, 16, 16, 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] [2022-11-19 08:12:32,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:12:32,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1466107333, now seen corresponding path program 1 times [2022-11-19 08:12:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:32,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541378886] [2022-11-19 08:12:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2022-11-19 08:12:32,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:32,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541378886] [2022-11-19 08:12:32,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541378886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:32,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:32,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220403166] [2022-11-19 08:12:32,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:32,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:32,840 INFO L87 Difference]: Start difference. First operand 13320 states and 19017 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-19 08:12:40,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:41,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:43,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:45,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:48,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:53,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:57,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:57,651 INFO L93 Difference]: Finished difference Result 31001 states and 44338 transitions. [2022-11-19 08:12:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 240 [2022-11-19 08:12:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:57,759 INFO L225 Difference]: With dead ends: 31001 [2022-11-19 08:12:57,759 INFO L226 Difference]: Without dead ends: 18062 [2022-11-19 08:12:57,812 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:12:57,813 INFO L413 NwaCegarLoop]: 5586 mSDtfsCounter, 2845 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2845 SdHoareTripleChecker+Valid, 8678 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:57,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2845 Valid, 8678 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1427 Invalid, 2 Unknown, 0 Unchecked, 24.0s Time] [2022-11-19 08:12:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18062 states. [2022-11-19 08:12:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18062 to 18050. [2022-11-19 08:12:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18050 states, 10494 states have (on average 1.2181246426529446) internal successors, (12783), 10730 states have internal predecessors, (12783), 6491 states have call successors, (6491), 1066 states have call predecessors, (6491), 1063 states have return successors, (6499), 6394 states have call predecessors, (6499), 6489 states have call successors, (6499) [2022-11-19 08:12:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18050 states to 18050 states and 25773 transitions. [2022-11-19 08:12:59,233 INFO L78 Accepts]: Start accepts. Automaton has 18050 states and 25773 transitions. Word has length 240 [2022-11-19 08:12:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:59,234 INFO L495 AbstractCegarLoop]: Abstraction has 18050 states and 25773 transitions. [2022-11-19 08:12:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-19 08:12:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18050 states and 25773 transitions. [2022-11-19 08:12:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-19 08:12:59,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:59,243 INFO L195 NwaCegarLoop]: trace histogram [22, 16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:59,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:12:59,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -446798053, now seen corresponding path program 1 times [2022-11-19 08:12:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:59,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68126898] [2022-11-19 08:12:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1325 trivial. 0 not checked. [2022-11-19 08:13:00,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68126898] [2022-11-19 08:13:00,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68126898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:00,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:00,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:13:00,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5224314] [2022-11-19 08:13:00,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:13:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:13:00,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:13:00,532 INFO L87 Difference]: Start difference. First operand 18050 states and 25773 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 08:13:04,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:07,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:14,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:21,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:23,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:25,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:29,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:30,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:32,504 INFO L93 Difference]: Finished difference Result 23237 states and 33899 transitions. [2022-11-19 08:13:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:13:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 302 [2022-11-19 08:13:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:32,636 INFO L225 Difference]: With dead ends: 23237 [2022-11-19 08:13:32,636 INFO L226 Difference]: Without dead ends: 23235 [2022-11-19 08:13:32,657 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:13:32,657 INFO L413 NwaCegarLoop]: 5003 mSDtfsCounter, 5312 mSDsluCounter, 8536 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 403 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5626 SdHoareTripleChecker+Valid, 13539 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:32,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5626 Valid, 13539 Invalid, 2492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [403 Valid, 2086 Invalid, 3 Unknown, 0 Unchecked, 31.1s Time] [2022-11-19 08:13:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23235 states. [2022-11-19 08:13:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23235 to 18050. [2022-11-19 08:13:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18050 states, 10494 states have (on average 1.217934057556699) internal successors, (12781), 10730 states have internal predecessors, (12781), 6491 states have call successors, (6491), 1066 states have call predecessors, (6491), 1063 states have return successors, (6499), 6394 states have call predecessors, (6499), 6489 states have call successors, (6499) [2022-11-19 08:13:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18050 states to 18050 states and 25771 transitions. [2022-11-19 08:13:34,511 INFO L78 Accepts]: Start accepts. Automaton has 18050 states and 25771 transitions. Word has length 302 [2022-11-19 08:13:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:34,512 INFO L495 AbstractCegarLoop]: Abstraction has 18050 states and 25771 transitions. [2022-11-19 08:13:34,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 08:13:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 18050 states and 25771 transitions. [2022-11-19 08:13:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2022-11-19 08:13:34,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:34,554 INFO L195 NwaCegarLoop]: trace histogram [31, 19, 19, 19, 19, 19, 19, 18, 18, 8, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:13:34,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash -510550215, now seen corresponding path program 1 times [2022-11-19 08:13:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754577730] [2022-11-19 08:13:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:34,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2022-11-19 08:13:36,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754577730] [2022-11-19 08:13:36,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754577730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:36,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:36,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:13:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383821817] [2022-11-19 08:13:36,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:13:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:36,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:13:36,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:36,741 INFO L87 Difference]: Start difference. First operand 18050 states and 25771 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2022-11-19 08:13:44,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:47,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:51,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:51,466 INFO L93 Difference]: Finished difference Result 40794 states and 58967 transitions. [2022-11-19 08:13:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:13:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 661 [2022-11-19 08:13:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:51,586 INFO L225 Difference]: With dead ends: 40794 [2022-11-19 08:13:51,586 INFO L226 Difference]: Without dead ends: 23125 [2022-11-19 08:13:51,662 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:13:51,663 INFO L413 NwaCegarLoop]: 3919 mSDtfsCounter, 661 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 7237 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:51,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 7237 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1075 Invalid, 2 Unknown, 0 Unchecked, 13.9s Time] [2022-11-19 08:13:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23125 states. [2022-11-19 08:13:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23125 to 18054. [2022-11-19 08:13:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 10498 states have (on average 1.2178510192417604) internal successors, (12785), 10734 states have internal predecessors, (12785), 6491 states have call successors, (6491), 1066 states have call predecessors, (6491), 1063 states have return successors, (6499), 6394 states have call predecessors, (6499), 6489 states have call successors, (6499) [2022-11-19 08:13:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25775 transitions. [2022-11-19 08:13:53,467 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25775 transitions. Word has length 661 [2022-11-19 08:13:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:53,468 INFO L495 AbstractCegarLoop]: Abstraction has 18054 states and 25775 transitions. [2022-11-19 08:13:53,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2022-11-19 08:13:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25775 transitions. [2022-11-19 08:13:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-11-19 08:13:53,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:53,520 INFO L195 NwaCegarLoop]: trace histogram [31, 19, 19, 19, 19, 19, 19, 18, 18, 8, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:13:53,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -16940622, now seen corresponding path program 1 times [2022-11-19 08:13:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22210688] [2022-11-19 08:13:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2022-11-19 08:13:58,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:58,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22210688] [2022-11-19 08:13:58,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22210688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:58,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:58,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:13:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543192661] [2022-11-19 08:13:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:13:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:13:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:13:58,422 INFO L87 Difference]: Start difference. First operand 18054 states and 25775 transitions. Second operand has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 3 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2022-11-19 08:14:09,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:19,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:27,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:28,846 INFO L93 Difference]: Finished difference Result 45609 states and 66508 transitions. [2022-11-19 08:14:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:14:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 3 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) Word has length 663 [2022-11-19 08:14:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:28,956 INFO L225 Difference]: With dead ends: 45609 [2022-11-19 08:14:28,957 INFO L226 Difference]: Without dead ends: 27936 [2022-11-19 08:14:29,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:14:29,020 INFO L413 NwaCegarLoop]: 4111 mSDtfsCounter, 2423 mSDsluCounter, 11415 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 834 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2732 SdHoareTripleChecker+Valid, 15526 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2732 Valid, 15526 Invalid, 3219 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [834 Valid, 2383 Invalid, 2 Unknown, 0 Unchecked, 28.9s Time] [2022-11-19 08:14:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27936 states. [2022-11-19 08:14:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27936 to 18062. [2022-11-19 08:14:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18062 states, 10506 states have (on average 1.2176851323053492) internal successors, (12793), 10742 states have internal predecessors, (12793), 6491 states have call successors, (6491), 1066 states have call predecessors, (6491), 1063 states have return successors, (6499), 6394 states have call predecessors, (6499), 6489 states have call successors, (6499) [2022-11-19 08:14:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18062 states to 18062 states and 25783 transitions. [2022-11-19 08:14:30,664 INFO L78 Accepts]: Start accepts. Automaton has 18062 states and 25783 transitions. Word has length 663 [2022-11-19 08:14:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:30,666 INFO L495 AbstractCegarLoop]: Abstraction has 18062 states and 25783 transitions. [2022-11-19 08:14:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 3 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2022-11-19 08:14:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18062 states and 25783 transitions. [2022-11-19 08:14:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2022-11-19 08:14:30,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:30,697 INFO L195 NwaCegarLoop]: trace histogram [31, 19, 19, 19, 19, 19, 19, 18, 18, 8, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:14:30,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1515123461, now seen corresponding path program 1 times [2022-11-19 08:14:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:30,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016935205] [2022-11-19 08:14:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2022-11-19 08:14:33,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:33,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016935205] [2022-11-19 08:14:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016935205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:33,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:33,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:14:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173463339] [2022-11-19 08:14:33,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:33,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:33,196 INFO L87 Difference]: Start difference. First operand 18062 states and 25783 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2022-11-19 08:14:44,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:48,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:52,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:52,900 INFO L93 Difference]: Finished difference Result 41143 states and 58680 transitions. [2022-11-19 08:14:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 665 [2022-11-19 08:14:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:52,976 INFO L225 Difference]: With dead ends: 41143 [2022-11-19 08:14:52,976 INFO L226 Difference]: Without dead ends: 23462 [2022-11-19 08:14:53,119 INFO L412 NwaCegarLoop]: 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 [2022-11-19 08:14:53,120 INFO L413 NwaCegarLoop]: 5358 mSDtfsCounter, 2604 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2604 SdHoareTripleChecker+Valid, 8442 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:53,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2604 Valid, 8442 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1386 Invalid, 2 Unknown, 0 Unchecked, 18.6s Time] [2022-11-19 08:14:53,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2022-11-19 08:14:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 23449. [2022-11-19 08:14:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23449 states, 13705 states have (on average 1.2221087194454578) internal successors, (16749), 14015 states have internal predecessors, (16749), 8313 states have call successors, (8313), 1434 states have call predecessors, (8313), 1429 states have return successors, (8323), 8182 states have call predecessors, (8323), 8311 states have call successors, (8323) [2022-11-19 08:14:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23449 states to 23449 states and 33385 transitions. [2022-11-19 08:14:54,514 INFO L78 Accepts]: Start accepts. Automaton has 23449 states and 33385 transitions. Word has length 665 [2022-11-19 08:14:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:54,515 INFO L495 AbstractCegarLoop]: Abstraction has 23449 states and 33385 transitions. [2022-11-19 08:14:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2022-11-19 08:14:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23449 states and 33385 transitions. [2022-11-19 08:14:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-11-19 08:14:54,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:54,557 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:14:54,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2018645161, now seen corresponding path program 1 times [2022-11-19 08:14:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:54,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676673664] [2022-11-19 08:14:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:14:57,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676673664] [2022-11-19 08:14:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676673664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:57,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:57,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:14:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553086546] [2022-11-19 08:14:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:14:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:14:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:57,255 INFO L87 Difference]: Start difference. First operand 23449 states and 33385 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:15:03,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:16,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:21,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:28,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:32,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:33,432 INFO L93 Difference]: Finished difference Result 51713 states and 73476 transitions. [2022-11-19 08:15:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:15:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 687 [2022-11-19 08:15:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:33,605 INFO L225 Difference]: With dead ends: 51713 [2022-11-19 08:15:33,605 INFO L226 Difference]: Without dead ends: 28645 [2022-11-19 08:15:33,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:33,649 INFO L413 NwaCegarLoop]: 5357 mSDtfsCounter, 2556 mSDsluCounter, 13798 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 19155 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:33,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2556 Valid, 19155 Invalid, 3066 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 3062 Invalid, 3 Unknown, 0 Unchecked, 35.0s Time] [2022-11-19 08:15:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28645 states. [2022-11-19 08:15:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28645 to 28620. [2022-11-19 08:15:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28620 states, 16694 states have (on average 1.2165448664190728) internal successors, (20309), 17078 states have internal predecessors, (20309), 10129 states have call successors, (10129), 1796 states have call predecessors, (10129), 1795 states have return successors, (10147), 9970 states have call predecessors, (10147), 10127 states have call successors, (10147) [2022-11-19 08:15:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28620 states to 28620 states and 40585 transitions. [2022-11-19 08:15:35,190 INFO L78 Accepts]: Start accepts. Automaton has 28620 states and 40585 transitions. Word has length 687 [2022-11-19 08:15:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:35,191 INFO L495 AbstractCegarLoop]: Abstraction has 28620 states and 40585 transitions. [2022-11-19 08:15:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:15:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28620 states and 40585 transitions. [2022-11-19 08:15:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-11-19 08:15:35,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:35,228 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:35,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:15:35,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2108069777, now seen corresponding path program 1 times [2022-11-19 08:15:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:35,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004237460] [2022-11-19 08:15:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:15:38,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004237460] [2022-11-19 08:15:38,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004237460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:38,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:38,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:15:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783140565] [2022-11-19 08:15:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:38,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:15:38,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:15:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:38,045 INFO L87 Difference]: Start difference. First operand 28620 states and 40585 transitions. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:15:55,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:11,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:12,325 INFO L93 Difference]: Finished difference Result 62083 states and 87908 transitions. [2022-11-19 08:16:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 688 [2022-11-19 08:16:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:12,446 INFO L225 Difference]: With dead ends: 62083 [2022-11-19 08:16:12,446 INFO L226 Difference]: Without dead ends: 33844 [2022-11-19 08:16:12,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:12,659 INFO L413 NwaCegarLoop]: 5362 mSDtfsCounter, 2577 mSDsluCounter, 13788 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 19150 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:12,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2577 Valid, 19150 Invalid, 3071 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 3066 Invalid, 2 Unknown, 0 Unchecked, 32.8s Time] [2022-11-19 08:16:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33844 states. [2022-11-19 08:16:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33844 to 33819. [2022-11-19 08:16:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33819 states, 19703 states have (on average 1.2124549560980562) internal successors, (23889), 20161 states have internal predecessors, (23889), 11945 states have call successors, (11945), 2166 states have call predecessors, (11945), 2169 states have return successors, (11971), 11758 states have call predecessors, (11971), 11943 states have call successors, (11971) [2022-11-19 08:16:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33819 states to 33819 states and 47805 transitions. [2022-11-19 08:16:15,726 INFO L78 Accepts]: Start accepts. Automaton has 33819 states and 47805 transitions. Word has length 688 [2022-11-19 08:16:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:15,727 INFO L495 AbstractCegarLoop]: Abstraction has 33819 states and 47805 transitions. [2022-11-19 08:16:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:16:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 33819 states and 47805 transitions. [2022-11-19 08:16:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-11-19 08:16:15,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:15,762 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:16:15,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:15,763 INFO L85 PathProgramCache]: Analyzing trace with hash 154946701, now seen corresponding path program 1 times [2022-11-19 08:16:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254655404] [2022-11-19 08:16:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:16:18,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254655404] [2022-11-19 08:16:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254655404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:18,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:18,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:16:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631198313] [2022-11-19 08:16:18,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:18,371 INFO L87 Difference]: Start difference. First operand 33819 states and 47805 transitions. Second operand has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:16:24,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:26,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:33,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:34,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:36,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:40,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:42,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:44,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:46,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:58,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:00,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:01,297 INFO L93 Difference]: Finished difference Result 72831 states and 102796 transitions. [2022-11-19 08:17:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:17:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 689 [2022-11-19 08:17:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:01,434 INFO L225 Difference]: With dead ends: 72831 [2022-11-19 08:17:01,434 INFO L226 Difference]: Without dead ends: 39393 [2022-11-19 08:17:01,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:17:01,505 INFO L413 NwaCegarLoop]: 5236 mSDtfsCounter, 2446 mSDsluCounter, 13521 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 18757 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:01,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2446 Valid, 18757 Invalid, 3014 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 3003 Invalid, 5 Unknown, 0 Unchecked, 41.1s Time] [2022-11-19 08:17:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39393 states. [2022-11-19 08:17:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39393 to 39350. [2022-11-19 08:17:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39350 states, 22856 states have (on average 1.2071666083304164) internal successors, (27591), 23384 states have internal predecessors, (27591), 13903 states have call successors, (13903), 2582 states have call predecessors, (13903), 2589 states have return successors, (13937), 13692 states have call predecessors, (13937), 13901 states have call successors, (13937) [2022-11-19 08:17:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39350 states to 39350 states and 55431 transitions. [2022-11-19 08:17:03,703 INFO L78 Accepts]: Start accepts. Automaton has 39350 states and 55431 transitions. Word has length 689 [2022-11-19 08:17:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:03,703 INFO L495 AbstractCegarLoop]: Abstraction has 39350 states and 55431 transitions. [2022-11-19 08:17:03,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:17:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 39350 states and 55431 transitions. [2022-11-19 08:17:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-11-19 08:17:03,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:03,732 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:03,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:17:03,733 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -783873470, now seen corresponding path program 1 times [2022-11-19 08:17:03,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:03,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319166593] [2022-11-19 08:17:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:03,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:17:06,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:06,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319166593] [2022-11-19 08:17:06,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319166593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:17:06,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:17:06,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:17:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57787204] [2022-11-19 08:17:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:17:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:17:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:17:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:17:06,046 INFO L87 Difference]: Start difference. First operand 39350 states and 55431 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:17:18,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:25,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:33,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:38,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:41,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:42,104 INFO L93 Difference]: Finished difference Result 83559 states and 117644 transitions. [2022-11-19 08:17:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:17:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 690 [2022-11-19 08:17:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:42,252 INFO L225 Difference]: With dead ends: 83559 [2022-11-19 08:17:42,253 INFO L226 Difference]: Without dead ends: 44590 [2022-11-19 08:17:42,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:17:42,347 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2558 mSDsluCounter, 13804 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19165 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:42,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 19165 Invalid, 3088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 3079 Invalid, 2 Unknown, 0 Unchecked, 34.3s Time] [2022-11-19 08:17:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44590 states. [2022-11-19 08:17:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44590 to 44565. [2022-11-19 08:17:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44565 states, 25885 states have (on average 1.2049835812246474) internal successors, (31191), 26487 states have internal predecessors, (31191), 15719 states have call successors, (15719), 2948 states have call predecessors, (15719), 2959 states have return successors, (15761), 15480 states have call predecessors, (15761), 15717 states have call successors, (15761) [2022-11-19 08:17:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44565 states to 44565 states and 62671 transitions. [2022-11-19 08:17:44,909 INFO L78 Accepts]: Start accepts. Automaton has 44565 states and 62671 transitions. Word has length 690 [2022-11-19 08:17:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:44,910 INFO L495 AbstractCegarLoop]: Abstraction has 44565 states and 62671 transitions. [2022-11-19 08:17:44,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:17:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 44565 states and 62671 transitions. [2022-11-19 08:17:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-11-19 08:17:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:44,951 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:17:44,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1007712379, now seen corresponding path program 1 times [2022-11-19 08:17:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404806333] [2022-11-19 08:17:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:17:47,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:47,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404806333] [2022-11-19 08:17:47,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404806333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:17:47,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:17:47,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:17:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478298342] [2022-11-19 08:17:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:17:47,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:17:47,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:47,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:17:47,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:17:47,141 INFO L87 Difference]: Start difference. First operand 44565 states and 62671 transitions. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:17:53,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:58,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:03,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:06,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:11,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:22,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:25,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:26,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:29,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:29,743 INFO L93 Difference]: Finished difference Result 94013 states and 132156 transitions. [2022-11-19 08:18:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 691 [2022-11-19 08:18:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:29,964 INFO L225 Difference]: With dead ends: 94013 [2022-11-19 08:18:29,964 INFO L226 Difference]: Without dead ends: 49829 [2022-11-19 08:18:30,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:30,075 INFO L413 NwaCegarLoop]: 5360 mSDtfsCounter, 2569 mSDsluCounter, 13793 mSDsCounter, 0 mSdLazyCounter, 3082 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 19153 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3082 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:30,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 19153 Invalid, 3093 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 3082 Invalid, 3 Unknown, 0 Unchecked, 40.7s Time] [2022-11-19 08:18:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49829 states. [2022-11-19 08:18:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49829 to 49804. [2022-11-19 08:18:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49804 states, 28928 states have (on average 1.2031595685840708) internal successors, (34805), 29604 states have internal predecessors, (34805), 17541 states have call successors, (17541), 3318 states have call predecessors, (17541), 3333 states have return successors, (17591), 17274 states have call predecessors, (17591), 17539 states have call successors, (17591) [2022-11-19 08:18:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49804 states to 49804 states and 69937 transitions. [2022-11-19 08:18:32,868 INFO L78 Accepts]: Start accepts. Automaton has 49804 states and 69937 transitions. Word has length 691 [2022-11-19 08:18:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:32,869 INFO L495 AbstractCegarLoop]: Abstraction has 49804 states and 69937 transitions. [2022-11-19 08:18:32,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:18:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 49804 states and 69937 transitions. [2022-11-19 08:18:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-11-19 08:18:32,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:32,913 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:18:32,913 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2028818793, now seen corresponding path program 1 times [2022-11-19 08:18:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558038298] [2022-11-19 08:18:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:18:35,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558038298] [2022-11-19 08:18:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558038298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:35,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:35,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:18:35,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420876147] [2022-11-19 08:18:35,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:18:35,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:18:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:35,281 INFO L87 Difference]: Start difference. First operand 49804 states and 69937 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:18:45,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:47,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:48,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:49,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:50,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:18:56,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:12,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:15,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:15,874 INFO L93 Difference]: Finished difference Result 104471 states and 146676 transitions. [2022-11-19 08:19:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:19:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 692 [2022-11-19 08:19:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:16,066 INFO L225 Difference]: With dead ends: 104471 [2022-11-19 08:19:16,066 INFO L226 Difference]: Without dead ends: 55048 [2022-11-19 08:19:16,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:19:16,176 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2555 mSDsluCounter, 13806 mSDsCounter, 0 mSdLazyCounter, 3085 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2555 SdHoareTripleChecker+Valid, 19167 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3085 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:16,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2555 Valid, 19167 Invalid, 3096 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 3085 Invalid, 3 Unknown, 0 Unchecked, 38.2s Time] [2022-11-19 08:19:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55048 states. [2022-11-19 08:19:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55048 to 55023. [2022-11-19 08:19:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55023 states, 31965 states have (on average 1.2017206319411857) internal successors, (38413), 32715 states have internal predecessors, (38413), 19357 states have call successors, (19357), 3680 states have call predecessors, (19357), 3699 states have return successors, (19415), 19062 states have call predecessors, (19415), 19355 states have call successors, (19415) [2022-11-19 08:19:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55023 states to 55023 states and 77185 transitions. [2022-11-19 08:19:19,115 INFO L78 Accepts]: Start accepts. Automaton has 55023 states and 77185 transitions. Word has length 692 [2022-11-19 08:19:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:19,116 INFO L495 AbstractCegarLoop]: Abstraction has 55023 states and 77185 transitions. [2022-11-19 08:19:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:19:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 55023 states and 77185 transitions. [2022-11-19 08:19:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-11-19 08:19:19,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:19,149 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:19,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:19:19,149 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2021714584, now seen corresponding path program 1 times [2022-11-19 08:19:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:19,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214834968] [2022-11-19 08:19:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:19:21,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214834968] [2022-11-19 08:19:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214834968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:21,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:19:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711474112] [2022-11-19 08:19:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:19:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:19:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:19:21,995 INFO L87 Difference]: Start difference. First operand 55023 states and 77185 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:19:35,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:41,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:43,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:46,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:53,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:19:57,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:03,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:07,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:08,125 INFO L93 Difference]: Finished difference Result 114915 states and 161184 transitions. [2022-11-19 08:20:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:20:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 693 [2022-11-19 08:20:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:08,341 INFO L225 Difference]: With dead ends: 114915 [2022-11-19 08:20:08,342 INFO L226 Difference]: Without dead ends: 60273 [2022-11-19 08:20:08,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:20:08,622 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2558 mSDsluCounter, 13804 mSDsCounter, 0 mSdLazyCounter, 3089 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19165 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3089 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:08,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 19165 Invalid, 3103 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 3089 Invalid, 4 Unknown, 0 Unchecked, 43.4s Time] [2022-11-19 08:20:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60273 states. [2022-11-19 08:20:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60273 to 60248. [2022-11-19 08:20:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60248 states, 35008 states have (on average 1.200497029250457) internal successors, (42027), 35832 states have internal predecessors, (42027), 21173 states have call successors, (21173), 4042 states have call predecessors, (21173), 4065 states have return successors, (21239), 20850 states have call predecessors, (21239), 21171 states have call successors, (21239) [2022-11-19 08:20:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60248 states to 60248 states and 84439 transitions. [2022-11-19 08:20:11,776 INFO L78 Accepts]: Start accepts. Automaton has 60248 states and 84439 transitions. Word has length 693 [2022-11-19 08:20:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:11,777 INFO L495 AbstractCegarLoop]: Abstraction has 60248 states and 84439 transitions. [2022-11-19 08:20:11,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:20:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 60248 states and 84439 transitions. [2022-11-19 08:20:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-11-19 08:20:11,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:11,816 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:11,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:20:11,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1166076090, now seen corresponding path program 1 times [2022-11-19 08:20:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919869329] [2022-11-19 08:20:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:11,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:20:14,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919869329] [2022-11-19 08:20:14,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919869329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:14,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:14,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:20:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780437501] [2022-11-19 08:20:14,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:14,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:20:14,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:14,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:20:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:20:14,210 INFO L87 Difference]: Start difference. First operand 60248 states and 84439 transitions. Second operand has 5 states, 5 states have (on average 54.0) internal successors, (270), 4 states have internal predecessors, (270), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:20:21,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:34,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:52,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:20:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:53,365 INFO L93 Difference]: Finished difference Result 125371 states and 175704 transitions. [2022-11-19 08:20:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:20:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.0) internal successors, (270), 4 states have internal predecessors, (270), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 694 [2022-11-19 08:20:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:53,594 INFO L225 Difference]: With dead ends: 125371 [2022-11-19 08:20:53,594 INFO L226 Difference]: Without dead ends: 65504 [2022-11-19 08:20:53,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:20:53,727 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2558 mSDsluCounter, 13804 mSDsCounter, 0 mSdLazyCounter, 3090 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19165 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3090 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:53,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 19165 Invalid, 3104 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 3090 Invalid, 3 Unknown, 0 Unchecked, 36.3s Time] [2022-11-19 08:20:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65504 states. [2022-11-19 08:20:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65504 to 65479. [2022-11-19 08:20:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65479 states, 38057 states have (on average 1.1994376855768978) internal successors, (45647), 38955 states have internal predecessors, (45647), 22989 states have call successors, (22989), 4404 states have call predecessors, (22989), 4431 states have return successors, (23063), 22638 states have call predecessors, (23063), 22987 states have call successors, (23063) [2022-11-19 08:20:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65479 states to 65479 states and 91699 transitions. [2022-11-19 08:20:57,361 INFO L78 Accepts]: Start accepts. Automaton has 65479 states and 91699 transitions. Word has length 694 [2022-11-19 08:20:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:57,362 INFO L495 AbstractCegarLoop]: Abstraction has 65479 states and 91699 transitions. [2022-11-19 08:20:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.0) internal successors, (270), 4 states have internal predecessors, (270), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:20:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 65479 states and 91699 transitions. [2022-11-19 08:20:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-11-19 08:20:57,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:57,401 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:57,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:20:57,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1023802100, now seen corresponding path program 1 times [2022-11-19 08:20:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944129384] [2022-11-19 08:20:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:20:59,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944129384] [2022-11-19 08:20:59,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944129384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:59,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:20:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136407933] [2022-11-19 08:20:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:20:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:20:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:20:59,714 INFO L87 Difference]: Start difference. First operand 65479 states and 91699 transitions. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 4 states have internal predecessors, (271), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:21:19,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:21:37,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:21:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:38,599 INFO L93 Difference]: Finished difference Result 135839 states and 190236 transitions. [2022-11-19 08:21:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:21:38,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 4 states have internal predecessors, (271), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 695 [2022-11-19 08:21:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:38,853 INFO L225 Difference]: With dead ends: 135839 [2022-11-19 08:21:38,854 INFO L226 Difference]: Without dead ends: 70741 [2022-11-19 08:21:39,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:21:39,003 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2698 mSDsluCounter, 13665 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 19026 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:39,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2698 Valid, 19026 Invalid, 3107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 3093 Invalid, 2 Unknown, 0 Unchecked, 35.8s Time] [2022-11-19 08:21:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70741 states. [2022-11-19 08:21:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70741 to 70716. [2022-11-19 08:21:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70716 states, 41112 states have (on average 1.1985065187779724) internal successors, (49273), 42084 states have internal predecessors, (49273), 24805 states have call successors, (24805), 4766 states have call predecessors, (24805), 4797 states have return successors, (24887), 24426 states have call predecessors, (24887), 24803 states have call successors, (24887) [2022-11-19 08:21:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70716 states to 70716 states and 98965 transitions. [2022-11-19 08:21:43,145 INFO L78 Accepts]: Start accepts. Automaton has 70716 states and 98965 transitions. Word has length 695 [2022-11-19 08:21:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:43,146 INFO L495 AbstractCegarLoop]: Abstraction has 70716 states and 98965 transitions. [2022-11-19 08:21:43,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 4 states have internal predecessors, (271), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:21:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 70716 states and 98965 transitions. [2022-11-19 08:21:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2022-11-19 08:21:43,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:43,197 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:21:43,197 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1950390516, now seen corresponding path program 1 times [2022-11-19 08:21:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795857884] [2022-11-19 08:21:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:21:45,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795857884] [2022-11-19 08:21:45,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795857884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:45,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:45,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:21:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169263987] [2022-11-19 08:21:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:21:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:21:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:21:45,361 INFO L87 Difference]: Start difference. First operand 70716 states and 98965 transitions. Second operand has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:21:57,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:01,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:06,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:20,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:22,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:25,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:26,653 INFO L93 Difference]: Finished difference Result 146319 states and 204780 transitions. [2022-11-19 08:22:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:22:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 696 [2022-11-19 08:22:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:26,939 INFO L225 Difference]: With dead ends: 146319 [2022-11-19 08:22:26,939 INFO L226 Difference]: Without dead ends: 75984 [2022-11-19 08:22:27,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:22:27,130 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2558 mSDsluCounter, 13804 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19165 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:27,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 19165 Invalid, 3112 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 3097 Invalid, 2 Unknown, 0 Unchecked, 38.1s Time] [2022-11-19 08:22:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75984 states. [2022-11-19 08:22:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75984 to 75959. [2022-11-19 08:22:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75959 states, 44173 states have (on average 1.197677314196455) internal successors, (52905), 45219 states have internal predecessors, (52905), 26621 states have call successors, (26621), 5128 states have call predecessors, (26621), 5163 states have return successors, (26711), 26214 states have call predecessors, (26711), 26619 states have call successors, (26711) [2022-11-19 08:22:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75959 states to 75959 states and 106237 transitions. [2022-11-19 08:22:31,329 INFO L78 Accepts]: Start accepts. Automaton has 75959 states and 106237 transitions. Word has length 696 [2022-11-19 08:22:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:31,330 INFO L495 AbstractCegarLoop]: Abstraction has 75959 states and 106237 transitions. [2022-11-19 08:22:31,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:22:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 75959 states and 106237 transitions. [2022-11-19 08:22:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2022-11-19 08:22:31,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:31,382 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:31,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:22:31,382 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash -276753136, now seen corresponding path program 1 times [2022-11-19 08:22:31,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:31,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960273507] [2022-11-19 08:22:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:22:33,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:33,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960273507] [2022-11-19 08:22:33,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960273507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:33,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:33,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:22:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776905087] [2022-11-19 08:22:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:22:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:22:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:22:33,817 INFO L87 Difference]: Start difference. First operand 75959 states and 106237 transitions. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 4 states have internal predecessors, (273), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:22:47,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:48,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:22:54,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:10,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:14,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:15,112 INFO L93 Difference]: Finished difference Result 156811 states and 219336 transitions. [2022-11-19 08:23:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 4 states have internal predecessors, (273), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 697 [2022-11-19 08:23:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:15,426 INFO L225 Difference]: With dead ends: 156811 [2022-11-19 08:23:15,426 INFO L226 Difference]: Without dead ends: 81233 [2022-11-19 08:23:15,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:15,793 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2558 mSDsluCounter, 13804 mSDsCounter, 0 mSdLazyCounter, 3100 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19165 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3100 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:15,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 19165 Invalid, 3116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 3100 Invalid, 2 Unknown, 0 Unchecked, 37.8s Time] [2022-11-19 08:23:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81233 states. [2022-11-19 08:23:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81233 to 81208. [2022-11-19 08:23:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81208 states, 47240 states have (on average 1.1969305673158341) internal successors, (56543), 48360 states have internal predecessors, (56543), 28437 states have call successors, (28437), 5490 states have call predecessors, (28437), 5529 states have return successors, (28535), 28002 states have call predecessors, (28535), 28435 states have call successors, (28535) [2022-11-19 08:23:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81208 states to 81208 states and 113515 transitions. [2022-11-19 08:23:20,523 INFO L78 Accepts]: Start accepts. Automaton has 81208 states and 113515 transitions. Word has length 697 [2022-11-19 08:23:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:20,524 INFO L495 AbstractCegarLoop]: Abstraction has 81208 states and 113515 transitions. [2022-11-19 08:23:20,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 4 states have internal predecessors, (273), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:23:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 81208 states and 113515 transitions. [2022-11-19 08:23:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-11-19 08:23:20,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:20,578 INFO L195 NwaCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:20,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 08:23:20,578 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:20,579 INFO L85 PathProgramCache]: Analyzing trace with hash 345064399, now seen corresponding path program 1 times [2022-11-19 08:23:20,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:20,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71346407] [2022-11-19 08:23:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2022-11-19 08:23:22,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71346407] [2022-11-19 08:23:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71346407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:22,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:22,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154779355] [2022-11-19 08:23:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:22,926 INFO L87 Difference]: Start difference. First operand 81208 states and 113515 transitions. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 08:23:30,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:38,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:40,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:44,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:46,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:48,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:23:50,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:24:01,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:24:07,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:24:09,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:24:12,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:24:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:13,043 INFO L93 Difference]: Finished difference Result 167315 states and 233904 transitions. [2022-11-19 08:24:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:24:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 698 [2022-11-19 08:24:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:13,576 INFO L225 Difference]: With dead ends: 167315 [2022-11-19 08:24:13,576 INFO L226 Difference]: Without dead ends: 86488 [2022-11-19 08:24:13,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:24:13,805 INFO L413 NwaCegarLoop]: 5361 mSDtfsCounter, 2571 mSDsluCounter, 13792 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2571 SdHoareTripleChecker+Valid, 19153 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:13,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2571 Valid, 19153 Invalid, 3122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 3103 Invalid, 4 Unknown, 0 Unchecked, 46.5s Time] [2022-11-19 08:24:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86488 states.