./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh --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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- 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-2329fc7 [2022-12-14 06:36:11,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:36:11,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:36:11,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:36:11,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:36:11,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:36:11,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:36:11,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:36:11,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:36:11,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:36:11,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:36:11,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:36:11,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:36:11,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:36:11,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:36:11,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:36:11,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:36:11,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:36:11,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:36:11,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:36:11,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:36:11,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:36:11,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:36:11,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:36:11,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:36:11,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:36:11,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:36:11,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:36:11,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:36:11,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:36:11,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:36:11,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:36:11,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:36:11,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:36:11,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:36:11,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:36:11,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:36:11,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:36:11,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:36:11,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:36:11,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:36:11,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 06:36:11,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:36:11,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:36:11,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:36:11,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:36:11,766 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:36:11,766 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:36:11,766 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:36:11,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:36:11,766 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:36:11,767 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:36:11,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:36:11,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:36:11,768 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:36:11,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:36:11,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:36:11,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:11,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:36:11,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:36:11,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:36:11,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:36:11,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:36:11,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:36:11,771 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_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2022-12-14 06:36:11,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:36:11,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:36:11,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:36:11,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:36:11,968 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:36:11,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-12-14 06:36:14,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:36:14,869 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:36:14,870 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-12-14 06:36:14,892 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/data/54f919e39/b6825a6c4f3b48da8e80832d41f195ed/FLAGb9dc29ba4 [2022-12-14 06:36:15,115 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/data/54f919e39/b6825a6c4f3b48da8e80832d41f195ed [2022-12-14 06:36:15,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:36:15,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:36:15,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:15,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:36:15,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:36:15,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:15" (1/1) ... [2022-12-14 06:36:15,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c40e4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:15, skipping insertion in model container [2022-12-14 06:36:15,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:15" (1/1) ... [2022-12-14 06:36:15,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:36:15,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:36:15,712 WARN L623 FunctionHandler]: Unknown extern function __init_waitqueue_head [2022-12-14 06:36:15,713 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 06:36:15,805 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:15,841 WARN L237 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_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-12-14 06:36:15,883 WARN L623 FunctionHandler]: Unknown extern function netpoll_trap [2022-12-14 06:36:15,884 WARN L623 FunctionHandler]: Unknown extern function __netif_schedule [2022-12-14 06:36:15,891 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_null [2022-12-14 06:36:15,891 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 06:36:15,924 WARN L623 FunctionHandler]: Unknown extern function kfree_skb [2022-12-14 06:36:15,957 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-12-14 06:36:15,960 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-12-14 06:36:15,964 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-12-14 06:36:15,966 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:15,966 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:15,968 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-12-14 06:36:15,990 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:15,994 WARN L623 FunctionHandler]: Unknown extern function alloc_can_err_skb [2022-12-14 06:36:15,996 WARN L623 FunctionHandler]: Unknown extern function can_bus_off [2022-12-14 06:36:16,000 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,002 WARN L623 FunctionHandler]: Unknown extern function netif_rx [2022-12-14 06:36:16,007 WARN L623 FunctionHandler]: Unknown extern function alloc_can_skb [2022-12-14 06:36:16,009 WARN L623 FunctionHandler]: Unknown extern function netif_rx [2022-12-14 06:36:16,009 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,010 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,014 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,015 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,016 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,017 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,021 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,021 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,022 WARN L623 FunctionHandler]: Unknown extern function can_get_echo_skb [2022-12-14 06:36:16,023 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,027 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,027 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-12-14 06:36:16,028 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,031 WARN L623 FunctionHandler]: Unknown extern function usb_anchor_urb [2022-12-14 06:36:16,031 WARN L623 FunctionHandler]: Unknown extern function can_put_echo_skb [2022-12-14 06:36:16,032 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,032 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,033 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,033 WARN L623 FunctionHandler]: Unknown extern function can_free_echo_skb [2022-12-14 06:36:16,033 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,033 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,034 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,034 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,034 WARN L623 FunctionHandler]: Unknown extern function consume_skb [2022-12-14 06:36:16,041 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,041 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-12-14 06:36:16,042 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,043 WARN L623 FunctionHandler]: Unknown extern function usb_anchor_urb [2022-12-14 06:36:16,043 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,043 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,044 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,044 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,045 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,045 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,048 WARN L623 FunctionHandler]: Unknown extern function open_candev [2022-12-14 06:36:16,049 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,049 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,049 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,050 WARN L623 FunctionHandler]: Unknown extern function close_candev [2022-12-14 06:36:16,053 WARN L623 FunctionHandler]: Unknown extern function usb_kill_anchored_urbs [2022-12-14 06:36:16,053 WARN L623 FunctionHandler]: Unknown extern function usb_kill_anchored_urbs [2022-12-14 06:36:16,057 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,057 WARN L623 FunctionHandler]: Unknown extern function close_candev [2022-12-14 06:36:16,057 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,062 WARN L623 FunctionHandler]: Unknown extern function usb_string [2022-12-14 06:36:16,062 WARN L623 FunctionHandler]: Unknown extern function _dev_info [2022-12-14 06:36:16,063 WARN L623 FunctionHandler]: Unknown extern function alloc_candev [2022-12-14 06:36:16,063 WARN L623 FunctionHandler]: Unknown extern function dev_err [2022-12-14 06:36:16,065 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-12-14 06:36:16,066 WARN L623 FunctionHandler]: Unknown extern function register_candev [2022-12-14 06:36:16,066 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,067 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,067 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,067 WARN L623 FunctionHandler]: Unknown extern function devm_can_led_init [2022-12-14 06:36:16,068 WARN L623 FunctionHandler]: Unknown extern function unregister_netdev [2022-12-14 06:36:16,068 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 06:36:16,068 WARN L623 FunctionHandler]: Unknown extern function free_candev [2022-12-14 06:36:16,072 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,072 WARN L623 FunctionHandler]: Unknown extern function unregister_netdev [2022-12-14 06:36:16,072 WARN L623 FunctionHandler]: Unknown extern function free_candev [2022-12-14 06:36:16,093 WARN L623 FunctionHandler]: Unknown extern function ldv_initialize [2022-12-14 06:36:16,096 WARN L623 FunctionHandler]: Unknown extern function ldv_ndo_init_2 [2022-12-14 06:36:16,097 WARN L623 FunctionHandler]: Unknown extern function ldv_ndo_uninit_2 [2022-12-14 06:36:16,100 WARN L623 FunctionHandler]: Unknown extern function usb_register_driver [2022-12-14 06:36:16,101 WARN L623 FunctionHandler]: Unknown extern function usb_deregister [2022-12-14 06:36:16,107 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,116 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,136 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,136 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,137 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,142 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:16,167 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:36:16,256 WARN L623 FunctionHandler]: Unknown extern function __init_waitqueue_head [2022-12-14 06:36:16,256 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-12-14 06:36:16,257 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,259 WARN L237 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_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-12-14 06:36:16,261 WARN L623 FunctionHandler]: Unknown extern function netpoll_trap [2022-12-14 06:36:16,261 WARN L623 FunctionHandler]: Unknown extern function __netif_schedule [2022-12-14 06:36:16,262 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_null [2022-12-14 06:36:16,262 WARN L623 FunctionHandler]: Unknown extern function printk [2022-12-14 06:36:16,264 WARN L623 FunctionHandler]: Unknown extern function kfree_skb [2022-12-14 06:36:16,266 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-12-14 06:36:16,266 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-12-14 06:36:16,267 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-12-14 06:36:16,267 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,268 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,269 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-12-14 06:36:16,274 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,275 WARN L623 FunctionHandler]: Unknown extern function alloc_can_err_skb [2022-12-14 06:36:16,276 WARN L623 FunctionHandler]: Unknown extern function can_bus_off [2022-12-14 06:36:16,278 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,279 WARN L623 FunctionHandler]: Unknown extern function netif_rx [2022-12-14 06:36:16,280 WARN L623 FunctionHandler]: Unknown extern function alloc_can_skb [2022-12-14 06:36:16,282 WARN L623 FunctionHandler]: Unknown extern function netif_rx [2022-12-14 06:36:16,282 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,282 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,283 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,284 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,284 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,285 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,290 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,291 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,291 WARN L623 FunctionHandler]: Unknown extern function can_get_echo_skb [2022-12-14 06:36:16,291 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,292 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,293 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-12-14 06:36:16,293 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,298 WARN L623 FunctionHandler]: Unknown extern function usb_anchor_urb [2022-12-14 06:36:16,298 WARN L623 FunctionHandler]: Unknown extern function can_put_echo_skb [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function can_free_echo_skb [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,299 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,300 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,300 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,300 WARN L623 FunctionHandler]: Unknown extern function consume_skb [2022-12-14 06:36:16,301 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,302 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-12-14 06:36:16,302 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,302 WARN L623 FunctionHandler]: Unknown extern function usb_anchor_urb [2022-12-14 06:36:16,303 WARN L623 FunctionHandler]: Unknown extern function usb_unanchor_urb [2022-12-14 06:36:16,303 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-12-14 06:36:16,303 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,303 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,304 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,304 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,305 WARN L623 FunctionHandler]: Unknown extern function open_candev [2022-12-14 06:36:16,305 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,305 WARN L623 FunctionHandler]: Unknown extern function netif_device_detach [2022-12-14 06:36:16,305 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,305 WARN L623 FunctionHandler]: Unknown extern function close_candev [2022-12-14 06:36:16,306 WARN L623 FunctionHandler]: Unknown extern function usb_kill_anchored_urbs [2022-12-14 06:36:16,306 WARN L623 FunctionHandler]: Unknown extern function usb_kill_anchored_urbs [2022-12-14 06:36:16,306 WARN L623 FunctionHandler]: Unknown extern function netdev_warn [2022-12-14 06:36:16,307 WARN L623 FunctionHandler]: Unknown extern function close_candev [2022-12-14 06:36:16,307 WARN L623 FunctionHandler]: Unknown extern function can_led_event [2022-12-14 06:36:16,308 WARN L623 FunctionHandler]: Unknown extern function usb_string [2022-12-14 06:36:16,308 WARN L623 FunctionHandler]: Unknown extern function _dev_info [2022-12-14 06:36:16,309 WARN L623 FunctionHandler]: Unknown extern function alloc_candev [2022-12-14 06:36:16,309 WARN L623 FunctionHandler]: Unknown extern function dev_err [2022-12-14 06:36:16,310 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-12-14 06:36:16,311 WARN L623 FunctionHandler]: Unknown extern function register_candev [2022-12-14 06:36:16,311 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,311 WARN L623 FunctionHandler]: Unknown extern function netdev_err [2022-12-14 06:36:16,311 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,312 WARN L623 FunctionHandler]: Unknown extern function devm_can_led_init [2022-12-14 06:36:16,312 WARN L623 FunctionHandler]: Unknown extern function unregister_netdev [2022-12-14 06:36:16,312 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-12-14 06:36:16,312 WARN L623 FunctionHandler]: Unknown extern function free_candev [2022-12-14 06:36:16,313 WARN L623 FunctionHandler]: Unknown extern function netdev_info [2022-12-14 06:36:16,313 WARN L623 FunctionHandler]: Unknown extern function unregister_netdev [2022-12-14 06:36:16,313 WARN L623 FunctionHandler]: Unknown extern function free_candev [2022-12-14 06:36:16,315 WARN L623 FunctionHandler]: Unknown extern function ldv_initialize [2022-12-14 06:36:16,316 WARN L623 FunctionHandler]: Unknown extern function ldv_ndo_init_2 [2022-12-14 06:36:16,317 WARN L623 FunctionHandler]: Unknown extern function ldv_ndo_uninit_2 [2022-12-14 06:36:16,319 WARN L623 FunctionHandler]: Unknown extern function usb_register_driver [2022-12-14 06:36:16,319 WARN L623 FunctionHandler]: Unknown extern function usb_deregister [2022-12-14 06:36:16,320 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,321 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,324 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,324 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,324 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,326 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-12-14 06:36:16,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:16,359 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:36:16,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16 WrapperNode [2022-12-14 06:36:16,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:16,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:16,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:36:16,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:36:16,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,449 INFO L138 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2193 [2022-12-14 06:36:16,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:16,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:36:16,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:36:16,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:36:16,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:36:16,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:36:16,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:36:16,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:36:16,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (1/1) ... [2022-12-14 06:36:16,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:16,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:36:16,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-12-14 06:36:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-12-14 06:36:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-12-14 06:36:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2022-12-14 06:36:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-14 06:36:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-14 06:36:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-14 06:36:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 06:36:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 06:36:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-12-14 06:36:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-12-14 06:36:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-12-14 06:36:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-12-14 06:36:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:36:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2022-12-14 06:36:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2022-12-14 06:36:16,940 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:36:16,942 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:36:17,082 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-12-14 06:36:17,565 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-12-14 06:36:20,314 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:36:20,841 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:36:20,841 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 06:36:20,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:20 BoogieIcfgContainer [2022-12-14 06:36:20,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:36:20,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:36:20,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:36:20,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:36:20,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:36:15" (1/3) ... [2022-12-14 06:36:20,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6bb5bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:20, skipping insertion in model container [2022-12-14 06:36:20,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:16" (2/3) ... [2022-12-14 06:36:20,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6bb5bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:20, skipping insertion in model container [2022-12-14 06:36:20,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:20" (3/3) ... [2022-12-14 06:36:20,850 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-12-14 06:36:20,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:36:20,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:36:20,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:36:20,950 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;@42520a8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:36:20,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:36:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 292 states have (on average 1.3527397260273972) internal successors, (395), 311 states have internal predecessors, (395), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2022-12-14 06:36:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:36:20,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:20,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:20,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -315162317, now seen corresponding path program 1 times [2022-12-14 06:36:20,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:20,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982396989] [2022-12-14 06:36:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:20,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:36:21,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982396989] [2022-12-14 06:36:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982396989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:21,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:21,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759315048] [2022-12-14 06:36:21,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:21,394 INFO L87 Difference]: Start difference. First operand has 468 states, 292 states have (on average 1.3527397260273972) internal successors, (395), 311 states have internal predecessors, (395), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 06:36:24,432 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 [] [2022-12-14 06:36:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:24,560 INFO L93 Difference]: Finished difference Result 1370 states and 1911 transitions. [2022-12-14 06:36:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:24,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-14 06:36:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:24,581 INFO L225 Difference]: With dead ends: 1370 [2022-12-14 06:36:24,581 INFO L226 Difference]: Without dead ends: 887 [2022-12-14 06:36:24,586 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 [2022-12-14 06:36:24,589 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 605 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:24,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1210 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 06:36:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-12-14 06:36:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2022-12-14 06:36:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 562 states have (on average 1.3202846975088969) internal successors, (742), 580 states have internal predecessors, (742), 242 states have call successors, (242), 83 states have call predecessors, (242), 82 states have return successors, (238), 235 states have call predecessors, (238), 237 states have call successors, (238) [2022-12-14 06:36:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1222 transitions. [2022-12-14 06:36:24,718 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1222 transitions. Word has length 23 [2022-12-14 06:36:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:24,719 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1222 transitions. [2022-12-14 06:36:24,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 06:36:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1222 transitions. [2022-12-14 06:36:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 06:36:24,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:24,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:24,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:36:24,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:24,723 INFO L85 PathProgramCache]: Analyzing trace with hash -308089015, now seen corresponding path program 1 times [2022-12-14 06:36:24,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:24,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106307096] [2022-12-14 06:36:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:24,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:24,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106307096] [2022-12-14 06:36:24,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106307096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:24,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:24,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:24,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451179770] [2022-12-14 06:36:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:24,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:24,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:24,947 INFO L87 Difference]: Start difference. First operand 887 states and 1222 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:27,694 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 [] [2022-12-14 06:36:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:27,843 INFO L93 Difference]: Finished difference Result 1423 states and 1948 transitions. [2022-12-14 06:36:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:27,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-12-14 06:36:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:27,849 INFO L225 Difference]: With dead ends: 1423 [2022-12-14 06:36:27,850 INFO L226 Difference]: Without dead ends: 1420 [2022-12-14 06:36:27,850 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 [2022-12-14 06:36:27,851 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 361 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:27,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1123 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 06:36:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2022-12-14 06:36:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1408. [2022-12-14 06:36:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 901 states have (on average 1.3263041065482797) internal successors, (1195), 925 states have internal predecessors, (1195), 370 states have call successors, (370), 139 states have call predecessors, (370), 136 states have return successors, (366), 357 states have call predecessors, (366), 365 states have call successors, (366) [2022-12-14 06:36:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1931 transitions. [2022-12-14 06:36:27,922 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1931 transitions. Word has length 32 [2022-12-14 06:36:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:27,922 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 1931 transitions. [2022-12-14 06:36:27,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1931 transitions. [2022-12-14 06:36:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:36:27,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:27,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:36:27,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -961160603, now seen corresponding path program 1 times [2022-12-14 06:36:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406988372] [2022-12-14 06:36:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:27,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:28,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:28,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406988372] [2022-12-14 06:36:28,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406988372] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:28,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:28,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:28,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496993974] [2022-12-14 06:36:28,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:28,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:28,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:28,133 INFO L87 Difference]: Start difference. First operand 1408 states and 1931 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:30,730 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 [] [2022-12-14 06:36:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:30,875 INFO L93 Difference]: Finished difference Result 1558 states and 2111 transitions. [2022-12-14 06:36:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-12-14 06:36:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:30,881 INFO L225 Difference]: With dead ends: 1558 [2022-12-14 06:36:30,881 INFO L226 Difference]: Without dead ends: 1555 [2022-12-14 06:36:30,882 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 [2022-12-14 06:36:30,882 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 605 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:30,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 715 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 06:36:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-12-14 06:36:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2022-12-14 06:36:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 990 states have (on average 1.3212121212121213) internal successors, (1308), 1018 states have internal predecessors, (1308), 401 states have call successors, (401), 166 states have call predecessors, (401), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-12-14 06:36:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2108 transitions. [2022-12-14 06:36:30,940 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2108 transitions. Word has length 33 [2022-12-14 06:36:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:30,940 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2108 transitions. [2022-12-14 06:36:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2108 transitions. [2022-12-14 06:36:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 06:36:30,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:30,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:36:30,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash 268461516, now seen corresponding path program 1 times [2022-12-14 06:36:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:30,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71407855] [2022-12-14 06:36:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:31,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:31,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71407855] [2022-12-14 06:36:31,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71407855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:31,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:31,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460259353] [2022-12-14 06:36:31,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:31,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:31,021 INFO L87 Difference]: Start difference. First operand 1555 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:33,595 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 [] [2022-12-14 06:36:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:33,755 INFO L93 Difference]: Finished difference Result 1557 states and 2109 transitions. [2022-12-14 06:36:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-12-14 06:36:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:33,760 INFO L225 Difference]: With dead ends: 1557 [2022-12-14 06:36:33,761 INFO L226 Difference]: Without dead ends: 1554 [2022-12-14 06:36:33,761 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 [2022-12-14 06:36:33,762 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 602 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:33,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 713 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 06:36:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-12-14 06:36:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1554. [2022-12-14 06:36:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 990 states have (on average 1.3202020202020202) internal successors, (1307), 1017 states have internal predecessors, (1307), 400 states have call successors, (400), 166 states have call predecessors, (400), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-12-14 06:36:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2106 transitions. [2022-12-14 06:36:33,820 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2106 transitions. Word has length 34 [2022-12-14 06:36:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:33,820 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 2106 transitions. [2022-12-14 06:36:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2106 transitions. [2022-12-14 06:36:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 06:36:33,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:33,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:33,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:36:33,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash -267953592, now seen corresponding path program 1 times [2022-12-14 06:36:33,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:33,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505463899] [2022-12-14 06:36:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:33,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:33,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505463899] [2022-12-14 06:36:33,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505463899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:33,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:33,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083033934] [2022-12-14 06:36:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:33,904 INFO L87 Difference]: Start difference. First operand 1554 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:36,443 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 [] [2022-12-14 06:36:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:36,593 INFO L93 Difference]: Finished difference Result 1556 states and 2107 transitions. [2022-12-14 06:36:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-12-14 06:36:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:36,598 INFO L225 Difference]: With dead ends: 1556 [2022-12-14 06:36:36,598 INFO L226 Difference]: Without dead ends: 1553 [2022-12-14 06:36:36,599 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 [2022-12-14 06:36:36,600 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 599 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:36,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 711 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 06:36:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-12-14 06:36:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1553. [2022-12-14 06:36:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 990 states have (on average 1.3191919191919192) internal successors, (1306), 1016 states have internal predecessors, (1306), 399 states have call successors, (399), 166 states have call predecessors, (399), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-12-14 06:36:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2104 transitions. [2022-12-14 06:36:36,659 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2104 transitions. Word has length 35 [2022-12-14 06:36:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:36,659 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2104 transitions. [2022-12-14 06:36:36,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2104 transitions. [2022-12-14 06:36:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 06:36:36,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:36,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:36:36,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 283052111, now seen corresponding path program 1 times [2022-12-14 06:36:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:36,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848124137] [2022-12-14 06:36:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:36,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848124137] [2022-12-14 06:36:36,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848124137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:36,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:36,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950760625] [2022-12-14 06:36:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:36,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:36,744 INFO L87 Difference]: Start difference. First operand 1553 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:39,199 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 [] [2022-12-14 06:36:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:39,342 INFO L93 Difference]: Finished difference Result 1555 states and 2105 transitions. [2022-12-14 06:36:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:39,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-12-14 06:36:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:39,346 INFO L225 Difference]: With dead ends: 1555 [2022-12-14 06:36:39,347 INFO L226 Difference]: Without dead ends: 1546 [2022-12-14 06:36:39,347 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 [2022-12-14 06:36:39,348 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 596 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:39,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 710 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 06:36:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-12-14 06:36:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1546. [2022-12-14 06:36:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 984 states have (on average 1.3170731707317074) internal successors, (1296), 1009 states have internal predecessors, (1296), 398 states have call successors, (398), 166 states have call predecessors, (398), 163 states have return successors, (399), 388 states have call predecessors, (399), 397 states have call successors, (399) [2022-12-14 06:36:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2093 transitions. [2022-12-14 06:36:39,418 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2093 transitions. Word has length 36 [2022-12-14 06:36:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:39,418 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 2093 transitions. [2022-12-14 06:36:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:36:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2093 transitions. [2022-12-14 06:36:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 06:36:39,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:39,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:39,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:36:39,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1651237241, now seen corresponding path program 1 times [2022-12-14 06:36:39,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384231252] [2022-12-14 06:36:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:36:39,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:39,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384231252] [2022-12-14 06:36:39,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384231252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:39,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:39,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418523113] [2022-12-14 06:36:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:39,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:39,503 INFO L87 Difference]: Start difference. First operand 1546 states and 2093 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:36:42,328 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 [] [2022-12-14 06:36:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:42,489 INFO L93 Difference]: Finished difference Result 3650 states and 4918 transitions. [2022-12-14 06:36:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:42,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-12-14 06:36:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:42,498 INFO L225 Difference]: With dead ends: 3650 [2022-12-14 06:36:42,498 INFO L226 Difference]: Without dead ends: 2109 [2022-12-14 06:36:42,501 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 [2022-12-14 06:36:42,501 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 194 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:42,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1091 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 06:36:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-12-14 06:36:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2104. [2022-12-14 06:36:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1354 states have (on average 1.3183161004431314) internal successors, (1785), 1383 states have internal predecessors, (1785), 519 states have call successors, (519), 233 states have call predecessors, (519), 230 states have return successors, (520), 509 states have call predecessors, (520), 518 states have call successors, (520) [2022-12-14 06:36:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2824 transitions. [2022-12-14 06:36:42,590 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2824 transitions. Word has length 67 [2022-12-14 06:36:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:42,590 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 2824 transitions. [2022-12-14 06:36:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:36:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2824 transitions. [2022-12-14 06:36:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 06:36:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:42,593 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:42,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:36:42,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 625146169, now seen corresponding path program 1 times [2022-12-14 06:36:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:42,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420255208] [2022-12-14 06:36:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:36:42,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420255208] [2022-12-14 06:36:42,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420255208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:42,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:42,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:36:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309352686] [2022-12-14 06:36:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:42,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:42,733 INFO L87 Difference]: Start difference. First operand 2104 states and 2824 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:36:45,800 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 [] [2022-12-14 06:36:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:45,977 INFO L93 Difference]: Finished difference Result 4794 states and 6438 transitions. [2022-12-14 06:36:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:45,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2022-12-14 06:36:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:45,984 INFO L225 Difference]: With dead ends: 4794 [2022-12-14 06:36:45,984 INFO L226 Difference]: Without dead ends: 2701 [2022-12-14 06:36:45,987 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 [2022-12-14 06:36:45,987 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 198 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:45,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1183 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 06:36:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-12-14 06:36:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2696. [2022-12-14 06:36:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1760 states have (on average 1.3232954545454545) internal successors, (2329), 1793 states have internal predecessors, (2329), 639 states have call successors, (639), 299 states have call predecessors, (639), 296 states have return successors, (640), 629 states have call predecessors, (640), 638 states have call successors, (640) [2022-12-14 06:36:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3608 transitions. [2022-12-14 06:36:46,102 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3608 transitions. Word has length 79 [2022-12-14 06:36:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:46,102 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 3608 transitions. [2022-12-14 06:36:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:36:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3608 transitions. [2022-12-14 06:36:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:36:46,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:46,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-12-14 06:36:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:36:46,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1164872854, now seen corresponding path program 1 times [2022-12-14 06:36:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:46,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154406878] [2022-12-14 06:36:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:36:46,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154406878] [2022-12-14 06:36:46,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154406878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747649721] [2022-12-14 06:36:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:46,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:46,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:36:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:36:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 06:36:47,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:36:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747649721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:47,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:36:47,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-12-14 06:36:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22001541] [2022-12-14 06:36:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:36:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:36:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:36:47,020 INFO L87 Difference]: Start difference. First operand 2696 states and 3608 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:36:50,369 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 [] [2022-12-14 06:36:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:50,705 INFO L93 Difference]: Finished difference Result 5357 states and 7400 transitions. [2022-12-14 06:36:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:36:50,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-12-14 06:36:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:50,714 INFO L225 Difference]: With dead ends: 5357 [2022-12-14 06:36:50,714 INFO L226 Difference]: Without dead ends: 3733 [2022-12-14 06:36:50,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:36:50,718 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 284 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:50,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1830 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 06:36:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-12-14 06:36:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 2704. [2022-12-14 06:36:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 1768 states have (on average 1.3218325791855203) internal successors, (2337), 1801 states have internal predecessors, (2337), 639 states have call successors, (639), 299 states have call predecessors, (639), 296 states have return successors, (640), 629 states have call predecessors, (640), 638 states have call successors, (640) [2022-12-14 06:36:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3616 transitions. [2022-12-14 06:36:50,862 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3616 transitions. Word has length 88 [2022-12-14 06:36:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 3616 transitions. [2022-12-14 06:36:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:36:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3616 transitions. [2022-12-14 06:36:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 06:36:50,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:50,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-12-14 06:36:50,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:51,066 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 199502829, now seen corresponding path program 1 times [2022-12-14 06:36:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:51,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371521591] [2022-12-14 06:36:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:36:51,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:51,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371521591] [2022-12-14 06:36:51,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371521591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:51,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238217868] [2022-12-14 06:36:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:51,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:51,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:51,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:36:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 06:36:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:36:52,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:36:52,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238217868] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:52,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:36:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 11 [2022-12-14 06:36:52,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438033065] [2022-12-14 06:36:52,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:52,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:36:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:36:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:36:52,252 INFO L87 Difference]: Start difference. First operand 2704 states and 3616 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:36:55,585 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 [] [2022-12-14 06:36:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:56,121 INFO L93 Difference]: Finished difference Result 6517 states and 8733 transitions. [2022-12-14 06:36:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:36:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2022-12-14 06:36:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:56,131 INFO L225 Difference]: With dead ends: 6517 [2022-12-14 06:36:56,131 INFO L226 Difference]: Without dead ends: 3824 [2022-12-14 06:36:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:36:56,135 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 1178 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 382 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:56,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 1305 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 440 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 06:36:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2022-12-14 06:36:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3572. [2022-12-14 06:36:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2340 states have (on average 1.3235042735042735) internal successors, (3097), 2385 states have internal predecessors, (3097), 817 states have call successors, (817), 419 states have call predecessors, (817), 414 states have return successors, (820), 803 states have call predecessors, (820), 816 states have call successors, (820) [2022-12-14 06:36:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 4734 transitions. [2022-12-14 06:36:56,322 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 4734 transitions. Word has length 97 [2022-12-14 06:36:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:56,323 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 4734 transitions. [2022-12-14 06:36:56,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:36:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 4734 transitions. [2022-12-14 06:36:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 06:36:56,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:56,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-12-14 06:36:56,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:36:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:56,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -618821708, now seen corresponding path program 1 times [2022-12-14 06:36:56,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420889733] [2022-12-14 06:36:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:36:56,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420889733] [2022-12-14 06:36:56,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420889733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483732971] [2022-12-14 06:36:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:56,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:56,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:36:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:57,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 06:36:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:36:57,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:36:58,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483732971] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694250934] [2022-12-14 06:36:58,268 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 06:36:58,269 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:58,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:58,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:58,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:59,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 78 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 107 [2022-12-14 06:36:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:59,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-12-14 06:36:59,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 06:36:59,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 85 [2022-12-14 06:37:00,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-12-14 06:37:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:00,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-12-14 06:37:00,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-12-14 06:37:01,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-12-14 06:37:01,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-12-14 06:37:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:01,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-12-14 06:39:36,485 INFO L197 IcfgInterpreter]: Interpreting procedure can_led_event with input of size 214 for LOIs [2022-12-14 06:39:36,582 INFO L197 IcfgInterpreter]: Interpreting procedure close_candev with input of size 219 for LOIs [2022-12-14 06:39:36,682 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 228 for LOIs [2022-12-14 06:39:36,952 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_alloc_urb with input of size 216 for LOIs [2022-12-14 06:39:38,763 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 204 for LOIs [2022-12-14 06:39:38,839 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 122 for LOIs [2022-12-14 06:39:38,848 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 213 for LOIs [2022-12-14 06:39:39,026 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 206 for LOIs [2022-12-14 06:39:39,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:39:45,981 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 995 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:12,493 WARN L233 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 859 DAG size of output: 772 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:24,335 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 767 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:31,401 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 779 DAG size of output: 739 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:38,490 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 778 DAG size of output: 736 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:45,845 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 784 DAG size of output: 744 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:52,570 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 784 DAG size of output: 744 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:41:31,789 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 453 DAG size of output: 304 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:41:53,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75329#(and (<= 0 ~ldv_state_variable_2~0) (= ~__mod_usb_device_table~0.bInterfaceClass 0) (= ~__mod_usb_device_table~0.bcdDevice_hi 0) (= ~INTERF_STATE~0 0) (= |~#usb_8dev_table~0.offset| 0) (= ~LDV_IN_INTERRUPT~0 1) (<= ~usb_8dev_driver_group1~0.offset 0) (<= ~usb_8dev_netdev_ops_group1~0.offset 0) (= ~ldv_retval_1~0 0) (= ~__mod_usb_device_table~0.idVendor 0) (= ~usb_intfdata~0.base 0) (= ~completeFnBulk~0.base 0) (= ~completeFnBulkCounter~0 0) (<= 0 ~usb_8dev_driver_group1~0.offset) (= ~__mod_usb_device_table~0.bcdDevice_lo 0) (= ~__mod_usb_device_table~0.bDeviceProtocol 0) (= |~#usb_8dev_bittiming_const~0.base| 39) (= |~#usb_8dev_table~0.base| 37) (= ~__mod_usb_device_table~0.idProduct 0) (<= ~ldv_retval_3~0 0) (= ~__mod_usb_device_table~0.match_flags 0) (= ~__mod_usb_device_table~0.driver_info 0) (= ~ldv_state_variable_1~0 0) (= ~usb_dev~0.base 0) (= |~#usb_8dev_bittiming_const~0.offset| 0) (<= ~usb_8dev_driver_group1~0.base 0) (= ~ldv_state_variable_0~0 2) (= ~usb_dev~0.offset 0) (= ~dev_counter~0 0) (= ~__mod_usb_device_table~0.bDeviceClass 0) (<= 0 (+ ~ldv_retval_3~0 12)) (not (= (mod (+ ~usb_urb~0.base ~usb_urb~0.offset) 18446744073709551616) 0)) (= ~__mod_usb_device_table~0.bInterfaceSubClass 0) (= |~#usb_8dev_driver~0.offset| 0) (= ~ref_cnt~0 0) (= ~completeFnInt~0.base 0) (<= 0 ~usb_8dev_netdev_ops_group1~0.offset) (= ~__mod_usb_device_table~0.bInterfaceNumber 0) (= ~completeFnInt~0.offset 0) (= ~usb_intfdata~0.offset 0) (= |~#usb_8dev_netdev_ops~0.offset| 0) (= ~completeFnBulk~0.offset 0) (= ~__mod_usb_device_table~0.bDeviceSubClass 0) (= |#NULL.offset| 0) (<= ~usb_8dev_netdev_ops_group1~0.base 0) (= ~ldv_retval_0~0 0) (<= 0 ~usb_counter~0) (= 38 |~#usb_8dev_netdev_ops~0.base|) (= ~__mod_usb_device_table~0.bInterfaceProtocol 0) (= ~SERIAL_STATE~0 0) (= ~completeFnIntCounter~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~usb_8dev_netdev_ops_group1~0.base) (= 40 |~#usb_8dev_driver~0.base|) (= |#NULL.base| 0) (<= 0 ~usb_8dev_driver_group1~0.base))' at error location [2022-12-14 06:41:53,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:41:53,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:41:53,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-12-14 06:41:53,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319442401] [2022-12-14 06:41:53,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:41:53,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:41:53,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:41:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=4918, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 06:41:53,880 INFO L87 Difference]: Start difference. First operand 3572 states and 4734 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-14 06:42:02,365 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 [] [2022-12-14 06:42:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:06,161 INFO L93 Difference]: Finished difference Result 21679 states and 28815 transitions. [2022-12-14 06:42:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:42:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 96 [2022-12-14 06:42:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:06,208 INFO L225 Difference]: With dead ends: 21679 [2022-12-14 06:42:06,208 INFO L226 Difference]: Without dead ends: 18118 [2022-12-14 06:42:06,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 135.8s TimeCoverageRelationStatistics Valid=867, Invalid=6105, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 06:42:06,218 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 5747 mSDsluCounter, 4324 mSDsCounter, 0 mSdLazyCounter, 5387 mSolverCounterSat, 3459 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5798 SdHoareTripleChecker+Valid, 5704 SdHoareTripleChecker+Invalid, 8847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3459 IncrementalHoareTripleChecker+Valid, 5387 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:06,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5798 Valid, 5704 Invalid, 8847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3459 Valid, 5387 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-12-14 06:42:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18118 states. [2022-12-14 06:42:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18118 to 16671. [2022-12-14 06:42:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16671 states, 11112 states have (on average 1.3393628509719222) internal successors, (14883), 11329 states have internal predecessors, (14883), 3664 states have call successors, (3664), 1907 states have call predecessors, (3664), 1894 states have return successors, (3675), 3577 states have call predecessors, (3675), 3663 states have call successors, (3675) [2022-12-14 06:42:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16671 states to 16671 states and 22222 transitions. [2022-12-14 06:42:07,246 INFO L78 Accepts]: Start accepts. Automaton has 16671 states and 22222 transitions. Word has length 96 [2022-12-14 06:42:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:07,246 INFO L495 AbstractCegarLoop]: Abstraction has 16671 states and 22222 transitions. [2022-12-14 06:42:07,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-14 06:42:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16671 states and 22222 transitions. [2022-12-14 06:42:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:42:07,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:07,261 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2022-12-14 06:42:07,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:42:07,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:42:07,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash -860542488, now seen corresponding path program 1 times [2022-12-14 06:42:07,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:07,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40181722] [2022-12-14 06:42:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:07,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:42:07,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40181722] [2022-12-14 06:42:07,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40181722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278999565] [2022-12-14 06:42:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:07,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:07,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:07,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:07,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:42:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:42:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 06:42:08,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:42:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278999565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:08,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:42:08,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 06:42:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765956552] [2022-12-14 06:42:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:42:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:42:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:42:08,298 INFO L87 Difference]: Start difference. First operand 16671 states and 22222 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:42:11,408 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 [] [2022-12-14 06:42:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:11,834 INFO L93 Difference]: Finished difference Result 24631 states and 32858 transitions. [2022-12-14 06:42:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:42:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 105 [2022-12-14 06:42:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:11,850 INFO L225 Difference]: With dead ends: 24631 [2022-12-14 06:42:11,850 INFO L226 Difference]: Without dead ends: 7442 [2022-12-14 06:42:11,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:42:11,869 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 536 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:11,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 942 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 06:42:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2022-12-14 06:42:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7025. [2022-12-14 06:42:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7025 states, 4657 states have (on average 1.3278934936654498) internal successors, (6184), 4756 states have internal predecessors, (6184), 1562 states have call successors, (1562), 812 states have call predecessors, (1562), 805 states have return successors, (1567), 1521 states have call predecessors, (1567), 1561 states have call successors, (1567) [2022-12-14 06:42:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 9313 transitions. [2022-12-14 06:42:12,401 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 9313 transitions. Word has length 105 [2022-12-14 06:42:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:12,401 INFO L495 AbstractCegarLoop]: Abstraction has 7025 states and 9313 transitions. [2022-12-14 06:42:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:42:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 9313 transitions. [2022-12-14 06:42:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 06:42:12,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:12,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:12,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:42:12,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:42:12,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1774937848, now seen corresponding path program 1 times [2022-12-14 06:42:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:12,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403906309] [2022-12-14 06:42:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:42:13,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403906309] [2022-12-14 06:42:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403906309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102193288] [2022-12-14 06:42:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:13,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:13,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:13,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:42:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:14,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 06:42:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 06:42:14,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:42:14,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102193288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:14,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:42:14,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2022-12-14 06:42:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154136610] [2022-12-14 06:42:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:42:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:42:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:42:14,454 INFO L87 Difference]: Start difference. First operand 7025 states and 9313 transitions. Second operand has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:42:21,159 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 [] [2022-12-14 06:42:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:23,812 INFO L93 Difference]: Finished difference Result 15678 states and 21363 transitions. [2022-12-14 06:42:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 06:42:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2022-12-14 06:42:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:23,846 INFO L225 Difference]: With dead ends: 15678 [2022-12-14 06:42:23,846 INFO L226 Difference]: Without dead ends: 11505 [2022-12-14 06:42:23,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:42:23,857 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 825 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 5205 mSolverCounterSat, 361 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 5567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 5205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 2436 Invalid, 5567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 5205 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 06:42:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11505 states. [2022-12-14 06:42:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11505 to 10073. [2022-12-14 06:42:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10073 states, 6667 states have (on average 1.3254837258137093) internal successors, (8837), 6826 states have internal predecessors, (8837), 2243 states have call successors, (2243), 1145 states have call predecessors, (2243), 1162 states have return successors, (2368), 2196 states have call predecessors, (2368), 2242 states have call successors, (2368) [2022-12-14 06:42:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10073 states to 10073 states and 13448 transitions. [2022-12-14 06:42:24,647 INFO L78 Accepts]: Start accepts. Automaton has 10073 states and 13448 transitions. Word has length 106 [2022-12-14 06:42:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:24,647 INFO L495 AbstractCegarLoop]: Abstraction has 10073 states and 13448 transitions. [2022-12-14 06:42:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:42:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10073 states and 13448 transitions. [2022-12-14 06:42:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 06:42:24,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:24,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:24,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:42:24,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:24,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash 105623163, now seen corresponding path program 1 times [2022-12-14 06:42:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:24,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033675516] [2022-12-14 06:42:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:42:25,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033675516] [2022-12-14 06:42:25,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033675516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:25,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:42:25,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:42:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614380436] [2022-12-14 06:42:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:25,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:42:25,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:42:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:42:25,388 INFO L87 Difference]: Start difference. First operand 10073 states and 13448 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:42:30,492 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 [] [2022-12-14 06:42:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:31,788 INFO L93 Difference]: Finished difference Result 17932 states and 24552 transitions. [2022-12-14 06:42:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:42:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2022-12-14 06:42:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:31,821 INFO L225 Difference]: With dead ends: 17932 [2022-12-14 06:42:31,822 INFO L226 Difference]: Without dead ends: 17543 [2022-12-14 06:42:31,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:42:31,827 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 517 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:31,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 2667 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1239 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 06:42:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17543 states. [2022-12-14 06:42:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17543 to 12596. [2022-12-14 06:42:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12596 states, 8356 states have (on average 1.326232647199617) internal successors, (11082), 8551 states have internal predecessors, (11082), 2789 states have call successors, (2789), 1433 states have call predecessors, (2789), 1450 states have return successors, (2944), 2721 states have call predecessors, (2944), 2788 states have call successors, (2944) [2022-12-14 06:42:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12596 states to 12596 states and 16815 transitions. [2022-12-14 06:42:33,128 INFO L78 Accepts]: Start accepts. Automaton has 12596 states and 16815 transitions. Word has length 110 [2022-12-14 06:42:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:33,128 INFO L495 AbstractCegarLoop]: Abstraction has 12596 states and 16815 transitions. [2022-12-14 06:42:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:42:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 12596 states and 16815 transitions. [2022-12-14 06:42:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:42:33,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:33,136 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:33,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:42:33,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1736285246, now seen corresponding path program 1 times [2022-12-14 06:42:33,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:33,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903137798] [2022-12-14 06:42:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:42:35,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903137798] [2022-12-14 06:42:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903137798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:35,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886211297] [2022-12-14 06:42:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:35,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:35,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:35,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:42:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 06:42:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 06:42:36,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 06:42:37,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886211297] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:37,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:42:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 14] total 32 [2022-12-14 06:42:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778522443] [2022-12-14 06:42:37,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:37,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:42:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:42:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:42:37,864 INFO L87 Difference]: Start difference. First operand 12596 states and 16815 transitions. Second operand has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:42:43,768 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 [] [2022-12-14 06:42:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:46,389 INFO L93 Difference]: Finished difference Result 15425 states and 20593 transitions. [2022-12-14 06:42:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:42:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 125 [2022-12-14 06:42:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:46,418 INFO L225 Difference]: With dead ends: 15425 [2022-12-14 06:42:46,418 INFO L226 Difference]: Without dead ends: 15155 [2022-12-14 06:42:46,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 06:42:46,423 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 656 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:46,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1406 Valid, 1393 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 2203 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-12-14 06:42:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15155 states. [2022-12-14 06:42:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15155 to 12596. [2022-12-14 06:42:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12596 states, 8356 states have (on average 1.326232647199617) internal successors, (11082), 8551 states have internal predecessors, (11082), 2789 states have call successors, (2789), 1433 states have call predecessors, (2789), 1450 states have return successors, (2944), 2721 states have call predecessors, (2944), 2788 states have call successors, (2944) [2022-12-14 06:42:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12596 states to 12596 states and 16815 transitions. [2022-12-14 06:42:48,141 INFO L78 Accepts]: Start accepts. Automaton has 12596 states and 16815 transitions. Word has length 125 [2022-12-14 06:42:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:48,142 INFO L495 AbstractCegarLoop]: Abstraction has 12596 states and 16815 transitions. [2022-12-14 06:42:48,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 12.5) internal successors, (75), 7 states have internal predecessors, (75), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:42:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12596 states and 16815 transitions. [2022-12-14 06:42:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:42:48,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:48,149 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:48,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:42:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:42:48,350 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1311529841, now seen corresponding path program 1 times [2022-12-14 06:42:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:48,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384447329] [2022-12-14 06:42:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 06:42:48,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384447329] [2022-12-14 06:42:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384447329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736579193] [2022-12-14 06:42:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:48,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:48,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:42:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:42:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 52 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 06:42:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 06:42:49,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736579193] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:49,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:42:49,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 18 [2022-12-14 06:42:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289766298] [2022-12-14 06:42:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:49,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:42:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:42:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:42:49,522 INFO L87 Difference]: Start difference. First operand 12596 states and 16815 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:42:53,406 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 [] [2022-12-14 06:42:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:55,041 INFO L93 Difference]: Finished difference Result 28818 states and 38849 transitions. [2022-12-14 06:42:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:42:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2022-12-14 06:42:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:55,072 INFO L225 Difference]: With dead ends: 28818 [2022-12-14 06:42:55,072 INFO L226 Difference]: Without dead ends: 16965 [2022-12-14 06:42:55,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:42:55,090 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 553 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:55,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1678 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 599 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 06:42:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16965 states. [2022-12-14 06:42:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16965 to 15416. [2022-12-14 06:42:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15416 states, 10276 states have (on average 1.3303814713896458) internal successors, (13671), 10503 states have internal predecessors, (13671), 3369 states have call successors, (3369), 1753 states have call predecessors, (3369), 1770 states have return successors, (3524), 3289 states have call predecessors, (3524), 3368 states have call successors, (3524) [2022-12-14 06:42:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15416 states to 15416 states and 20564 transitions. [2022-12-14 06:42:57,111 INFO L78 Accepts]: Start accepts. Automaton has 15416 states and 20564 transitions. Word has length 125 [2022-12-14 06:42:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:57,111 INFO L495 AbstractCegarLoop]: Abstraction has 15416 states and 20564 transitions. [2022-12-14 06:42:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:42:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15416 states and 20564 transitions. [2022-12-14 06:42:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:42:57,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:57,122 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:57,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:42:57,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:42:57,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -359694030, now seen corresponding path program 1 times [2022-12-14 06:42:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:57,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694239730] [2022-12-14 06:42:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 06:42:57,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694239730] [2022-12-14 06:42:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694239730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:57,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:42:57,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:42:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216664085] [2022-12-14 06:42:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:42:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:42:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:42:57,495 INFO L87 Difference]: Start difference. First operand 15416 states and 20564 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 06:43:01,103 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 [] [2022-12-14 06:43:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:03,082 INFO L93 Difference]: Finished difference Result 34045 states and 46427 transitions. [2022-12-14 06:43:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-12-14 06:43:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:03,117 INFO L225 Difference]: With dead ends: 34045 [2022-12-14 06:43:03,117 INFO L226 Difference]: Without dead ends: 19372 [2022-12-14 06:43:03,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:03,137 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 179 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:03,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1194 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 06:43:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19372 states. [2022-12-14 06:43:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19372 to 13225. [2022-12-14 06:43:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13225 states, 8793 states have (on average 1.328670533378824) internal successors, (11683), 8995 states have internal predecessors, (11683), 2915 states have call successors, (2915), 1499 states have call predecessors, (2915), 1516 states have return successors, (3058), 2846 states have call predecessors, (3058), 2914 states have call successors, (3058) [2022-12-14 06:43:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13225 states to 13225 states and 17656 transitions. [2022-12-14 06:43:04,916 INFO L78 Accepts]: Start accepts. Automaton has 13225 states and 17656 transitions. Word has length 139 [2022-12-14 06:43:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:04,917 INFO L495 AbstractCegarLoop]: Abstraction has 13225 states and 17656 transitions. [2022-12-14 06:43:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 06:43:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13225 states and 17656 transitions. [2022-12-14 06:43:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 06:43:04,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:04,927 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:43:04,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1694929197, now seen corresponding path program 1 times [2022-12-14 06:43:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993993841] [2022-12-14 06:43:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:43:05,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993993841] [2022-12-14 06:43:05,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993993841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313903374] [2022-12-14 06:43:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:05,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:05,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:05,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:43:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:43:05,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 06:43:05,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:43:05,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313903374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:05,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:43:05,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 06:43:05,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812788251] [2022-12-14 06:43:05,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:05,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:05,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:05,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:43:05,536 INFO L87 Difference]: Start difference. First operand 13225 states and 17656 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 06:43:09,296 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 [] [2022-12-14 06:43:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:10,728 INFO L93 Difference]: Finished difference Result 22848 states and 30962 transitions. [2022-12-14 06:43:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 150 [2022-12-14 06:43:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:10,755 INFO L225 Difference]: With dead ends: 22848 [2022-12-14 06:43:10,755 INFO L226 Difference]: Without dead ends: 15018 [2022-12-14 06:43:10,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:43:10,767 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 169 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:10,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1321 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 06:43:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15018 states. [2022-12-14 06:43:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15018 to 13228. [2022-12-14 06:43:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13228 states, 8796 states have (on average 1.3285584356525693) internal successors, (11686), 8998 states have internal predecessors, (11686), 2915 states have call successors, (2915), 1499 states have call predecessors, (2915), 1516 states have return successors, (3058), 2846 states have call predecessors, (3058), 2914 states have call successors, (3058) [2022-12-14 06:43:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13228 states to 13228 states and 17659 transitions. [2022-12-14 06:43:12,525 INFO L78 Accepts]: Start accepts. Automaton has 13228 states and 17659 transitions. Word has length 150 [2022-12-14 06:43:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:12,525 INFO L495 AbstractCegarLoop]: Abstraction has 13228 states and 17659 transitions. [2022-12-14 06:43:12,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 06:43:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 13228 states and 17659 transitions. [2022-12-14 06:43:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 06:43:12,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:12,535 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-12-14 06:43:12,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:43:12,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:43:12,737 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1290372362, now seen corresponding path program 1 times [2022-12-14 06:43:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:12,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831039279] [2022-12-14 06:43:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:43:13,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831039279] [2022-12-14 06:43:13,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831039279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052827939] [2022-12-14 06:43:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:13,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:13,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:13,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:13,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:43:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:43:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 06:43:14,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:43:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 06:43:14,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052827939] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:14,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:43:14,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10] total 23 [2022-12-14 06:43:14,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300179773] [2022-12-14 06:43:14,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:43:14,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:43:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:43:14,279 INFO L87 Difference]: Start difference. First operand 13228 states and 17659 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 06:43:19,602 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 [] [2022-12-14 06:43:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:21,691 INFO L93 Difference]: Finished difference Result 27839 states and 37795 transitions. [2022-12-14 06:43:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:43:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 154 [2022-12-14 06:43:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:21,720 INFO L225 Difference]: With dead ends: 27839 [2022-12-14 06:43:21,720 INFO L226 Difference]: Without dead ends: 15354 [2022-12-14 06:43:21,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:43:21,737 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 952 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 124 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:21,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 2870 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1636 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-12-14 06:43:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15354 states. [2022-12-14 06:43:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15354 to 10408. [2022-12-14 06:43:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10408 states, 6953 states have (on average 1.3279160074787861) internal successors, (9233), 7096 states have internal predecessors, (9233), 2267 states have call successors, (2267), 1182 states have call predecessors, (2267), 1187 states have return successors, (2326), 2216 states have call predecessors, (2326), 2266 states have call successors, (2326) [2022-12-14 06:43:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10408 states to 10408 states and 13826 transitions. [2022-12-14 06:43:23,180 INFO L78 Accepts]: Start accepts. Automaton has 10408 states and 13826 transitions. Word has length 154 [2022-12-14 06:43:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:23,180 INFO L495 AbstractCegarLoop]: Abstraction has 10408 states and 13826 transitions. [2022-12-14 06:43:23,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 06:43:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10408 states and 13826 transitions. [2022-12-14 06:43:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 06:43:23,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:23,187 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:23,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:43:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:23,389 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -203515517, now seen corresponding path program 1 times [2022-12-14 06:43:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:23,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282044194] [2022-12-14 06:43:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 06:43:23,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282044194] [2022-12-14 06:43:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282044194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:23,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:23,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:43:23,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769604108] [2022-12-14 06:43:23,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:43:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:43:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:43:23,791 INFO L87 Difference]: Start difference. First operand 10408 states and 13826 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 06:43:28,636 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 [] [2022-12-14 06:43:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:30,280 INFO L93 Difference]: Finished difference Result 21685 states and 29825 transitions. [2022-12-14 06:43:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:43:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2022-12-14 06:43:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:30,305 INFO L225 Difference]: With dead ends: 21685 [2022-12-14 06:43:30,305 INFO L226 Difference]: Without dead ends: 13840 [2022-12-14 06:43:30,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:43:30,316 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 172 mSDsluCounter, 3612 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4378 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:30,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4378 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 738 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 06:43:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13840 states. [2022-12-14 06:43:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13840 to 10426. [2022-12-14 06:43:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 6968 states have (on average 1.3272101033295063) internal successors, (9248), 7105 states have internal predecessors, (9248), 2267 states have call successors, (2267), 1182 states have call predecessors, (2267), 1190 states have return successors, (2332), 2225 states have call predecessors, (2332), 2266 states have call successors, (2332) [2022-12-14 06:43:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 13847 transitions. [2022-12-14 06:43:31,764 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 13847 transitions. Word has length 157 [2022-12-14 06:43:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:31,764 INFO L495 AbstractCegarLoop]: Abstraction has 10426 states and 13847 transitions. [2022-12-14 06:43:31,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 06:43:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 13847 transitions. [2022-12-14 06:43:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 06:43:31,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:31,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2022-12-14 06:43:31,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 06:43:31,771 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 299464182, now seen corresponding path program 1 times [2022-12-14 06:43:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:31,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511521793] [2022-12-14 06:43:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 06:43:33,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511521793] [2022-12-14 06:43:33,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511521793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546189327] [2022-12-14 06:43:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:33,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:33,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:43:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 06:43:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 06:43:36,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:43:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 06:43:38,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546189327] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:38,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:43:38,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [25, 17] total 46 [2022-12-14 06:43:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365427587] [2022-12-14 06:43:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:43:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:43:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1909, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:43:38,415 INFO L87 Difference]: Start difference. First operand 10426 states and 13847 transitions. Second operand has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:43:45,322 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 [] [2022-12-14 06:43:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:49,531 INFO L93 Difference]: Finished difference Result 16988 states and 22926 transitions. [2022-12-14 06:43:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:43:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 161 [2022-12-14 06:43:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:49,559 INFO L225 Difference]: With dead ends: 16988 [2022-12-14 06:43:49,559 INFO L226 Difference]: Without dead ends: 16718 [2022-12-14 06:43:49,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 294 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:43:49,563 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 1029 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 396 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:49,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1603 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2627 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-12-14 06:43:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16718 states. [2022-12-14 06:43:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16718 to 10426. [2022-12-14 06:43:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 6968 states have (on average 1.3272101033295063) internal successors, (9248), 7105 states have internal predecessors, (9248), 2267 states have call successors, (2267), 1182 states have call predecessors, (2267), 1190 states have return successors, (2332), 2225 states have call predecessors, (2332), 2266 states have call successors, (2332) [2022-12-14 06:43:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 13847 transitions. [2022-12-14 06:43:51,326 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 13847 transitions. Word has length 161 [2022-12-14 06:43:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:51,327 INFO L495 AbstractCegarLoop]: Abstraction has 10426 states and 13847 transitions. [2022-12-14 06:43:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 13.0) internal successors, (91), 8 states have internal predecessors, (91), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 06:43:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 13847 transitions. [2022-12-14 06:43:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 06:43:51,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:51,336 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:51,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:43:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:51,538 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1855533596, now seen corresponding path program 1 times [2022-12-14 06:43:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982748253] [2022-12-14 06:43:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 06:43:51,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982748253] [2022-12-14 06:43:51,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982748253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125650571] [2022-12-14 06:43:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:51,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92260ac3-b0d3-4103-b2f3-876ecfe6a2c5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:43:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:43:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 06:43:52,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:43:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 06:43:52,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125650571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:43:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343357650] [2022-12-14 06:43:52,519 INFO L159 IcfgInterpreter]: Started Sifa with 149 locations of interest [2022-12-14 06:43:52,519 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:43:52,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:43:52,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:43:52,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:44:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:14,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 78 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 107 [2022-12-14 06:44:14,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 85 [2022-12-14 06:44:15,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-12-14 06:44:15,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 06:44:16,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-12-14 06:44:16,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-12-14 06:44:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:16,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-12-14 06:44:17,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 321 [2022-12-14 06:44:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:44:17,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-12-14 06:44:17,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-12-14 06:45:30,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:45:30,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 06:45:39,390 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2022-12-14 06:45:39,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 647 treesize of output 611 [2022-12-14 06:45:39,475 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2022-12-14 06:45:39,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 611 treesize of output 575 [2022-12-14 06:45:39,570 INFO L321 Elim1Store]: treesize reduction 27, result has 54.2 percent of original size [2022-12-14 06:45:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 590 treesize of output 589 [2022-12-14 06:46:38,940 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2022-12-14 06:46:38,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 647 treesize of output 611 [2022-12-14 06:46:39,029 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2022-12-14 06:46:39,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 611 treesize of output 575 [2022-12-14 06:46:39,128 INFO L321 Elim1Store]: treesize reduction 27, result has 54.2 percent of original size [2022-12-14 06:46:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 590 treesize of output 589 [2022-12-14 06:49:09,843 INFO L197 IcfgInterpreter]: Interpreting procedure can_led_event with input of size 216 for LOIs [2022-12-14 06:49:09,896 INFO L197 IcfgInterpreter]: Interpreting procedure usb_alloc_coherent with input of size 157 for LOIs [2022-12-14 06:49:10,676 INFO L197 IcfgInterpreter]: Interpreting procedure usb_anchor_urb with input of size 331 for LOIs [2022-12-14 06:49:12,637 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 228 for LOIs [2022-12-14 06:49:12,874 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_alloc_urb with input of size 216 for LOIs [2022-12-14 06:49:14,975 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 206 for LOIs [2022-12-14 06:49:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 06:49:15,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:49:16,144 INFO L197 IcfgInterpreter]: Interpreting procedure __create_pipe with input of size 200 for LOIs [2022-12-14 06:49:16,270 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 228 for LOIs [2022-12-14 06:49:16,426 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_usb_fill_bulk_urb_2 with input of size 192 for LOIs [2022-12-14 06:49:16,489 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_submit_urb with input of size 133 for LOIs [2022-12-14 06:49:16,662 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 192 for LOIs [2022-12-14 06:49:16,707 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 208 for LOIs [2022-12-14 06:49:16,757 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:49:22,813 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 995 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)